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Abstract

Meriwether Lewis and William Clark were explorers. This collection contains the manuscript journals kept by Lewis and Clark on their travels to the source of the Missouri River and across the continent to the Pacific Ocean. There are interlineations throughout by Nicholas Biddle, who published his narrative "History of the Expedition of Captains Lewis and Clark" (1814).

Background note

When Thomas Jefferson acceded to the Presidency in 1801, one of his great unfulfilled wishes was to see a proper scientific expedition carried overland to the Pacific. As a Congressman in 1783, he had failed to convince George Rogers Clark to explore the west, and in 1793, his plans for André Michaux fell prey to international political machinations, and several other attempts had failed at even earlier stages. But in 1801, Jefferson dusted off the basic plan he had devised for Michaux, and once again, prepared to send an exploring party to the west.

To lead his expedition, Jefferson selected his personal secretary, Meriwether Lewis, a political ally, fellow Virginian, and a rejected applicant (at the tender age of 19) for the Michaux expedition. Lewis was not the worldly savant that Jefferson was, but he was well-read, scientifically versed, wrote beautiful prose, and was experienced in wilderness life. Lewis was allowed to select his second in command, an old army friend, William Clark, with whom he had served in the Northwest Territory. Although less well-educated than Lewis, Clark was an astute observer in his own right and if his prose was less polished, he was a more conscientious diarist and a very capable cartographer. Differing in personality, the moody Lewis and solid Clark made a compatible team.

From the outset, the Lewis and Clark expedition seemed destined to enjoy a better fate than its predecessors. While Michaux had become ensnared in international rivalries after entering the field, Lewis and Clark were presented with news that the Louisiana Territory had been purchased, removing one more international hurdle to clear in an already arduous course. Although usually thought of as a scientific expedition, it was driven as much by political and commercial interests as scientific. In keeping with his Enlightened precepts, the information that Jefferson hoped to gain was practical as well as theoretical. He hoped as much to spur the extension of the fur trade further into the interior as to advance pure knowledge, and wished to determine which areas were most amenable to white settlement. On the political front, Lewis and Clark were specifically enjoined to cultivate alliances among the Indians to blunt Spanish and British influence in the region. Above all, the success of the expedition promised to aid in fulfilling what Americans thought was inevitable: extending American sovereignty from sea to sea.

Lewis left Philadelphia in the summer of 1803, and joined with Clark and a few recruits in Indiana before arriving late in the year at the staging area near St. Louis. After making final preparations, they set off on May 14, 1804, for the west, ascending the Mississippi to the mouth of the Missouri, and then westward. From North Dakota to nearly the coast, Lewis and Clark passed through lands that no Europeans had ever seen, before reaching their goal, the Pacific, in November 1805. On the return leg of their journey (begun on March 3, 1806), the two improvised an even more ambitious plan, splitting their party in two to cover more territory, before reuniting in North Dakota. They finally arrived back in St. Louis on September 23, 1806.

Today, all along the original trail, the expedition is remembered as an example of fortitude and scientific achievement. Unlike many who followed, the explorers were generally cooperative with the native peoples they encountered -- indeed, they were reliant upon them -- and on only one occasion did they resort to violence. In their descriptions of dozens of new plant and animal species, in their "ethnographic" descriptions of Native Americans, and in their invaluable maps of the region, Lewis and Clark more than justified Jefferson's confidence and truly set the stage for an American west.

Scope and content

The journals of Lewis and Clark housed at the APS constitute the major source of information on the transcontinental scientific expedition of the Corps of Discovery in 1804-1806. The bulk of the collection is comprised of 18 "codices" bound variously in red morocco leather, brown leather, or marbled-paper boards, and 12 loose leaf codices, these were kept alternately by Captains Meriwether Lewis and William Clark during their journey with the Corps of Discovery. Entries on the voyage west were made almost daily with few exceptions, though on the return voyage, there are several, occasionally substantial gaps. The collection also contains some loose pages that were not a part of the codices or that concern provenance.

Most journals include records of meteorological observations, of the geographic position of the Corps, and a narrative description of the events of the day and sights along the way. Lewis' occasionally fulsome prose contrasts with Clark's more utilitarian language, but both provide concise and often exacting descriptions of the flora and fauna, geography, and inhabitants of the western reaches of the Louisiana Territory. Both Lewis and Clark included rough sketches of items of interest, primarily plants, animals, or material goods associated with the Indians encountered. Clark was the cartographer.

The APS has digitized many of the pages from the journals. Links to available digital versions of the pages are included in the inventory. You may also view a gallery of all images here.

Native American Images note : Sixty-nine original ink sketches of maps, animals, fishes, and Native American artifacts drawn by Meriwether Lewis and William Clark from 1803-1806 in their journal notes during the Corps of Discovery’s exploration west to the Pacific Ocean. Native American artifact images include: Shoshone smoking pipe and fish weir; Mandan war hatchet and battle axe; Chinook paddle, arrow, fish hook & line, conic hat, canoes, and house; Flathead (Salish) profiles and cradleboard. All 18 bound codices and 12 loose-leaved codices are referenced in John Freeman’s Guide to Manuscripts relating to the American Indian in the Library of the American Philosophical Society, particularly Codex I (Clark) and Codex J (Lewis) contain the largest number of ethnological sketches. An inventory of illustrations is available. Also noted in Murphy Smith’s Historical American Sketches. Other related images include: the journal of Patrick Gass, Sergeant of the Corps, published in 1811, contains six black and white engravings of Oto, Missouri, Mandan and Blackfoot (Sihasapa) Indians. Of particular note, an 1807 crayon portrait of Shahaka (Grand Blanc), drawn by Charles Balthazar Julien Fevret de Saint-Memin, a Mandan chief known to Lewis and Clark at their winter camp from 1804-1805.

Arrangement

When the journals were edited in the early 1890s, Elliot Coues placed a paper label identifying each volume on the outside of the front cover and a listing of contents inside, and he supplied interlinear annotations in red ink. Those contents listing are reproduced here.

While the primary organizational unit of the collection is the codex, the collection as a whole is divided into nine volumes, with Volumes I-V each holding multiple codices. This distinction is important as the non-codex material (Volumes VI-IX) follows the codices and requires the earlier volume numbers to maintain numerical consistency.

Collection information

Provenance

Deposited in part by Thomas Jefferson, 1817, and Nicholas Biddle, 1818; presented in part by Charles J. Biddle, 1949.

Preferred citation

Cite as: Lewis and Clark Journals, American Philosophical Society.

Processing information

Prepared by rsc, 2001.

Alternate formats available

The journals have been microfilmed in their entirety on two reels (Film 214).

Related material

The Beinecke Rare Book and Manuscript Library at Yale University holds a collection of Field Maps (WA MSS 303-304).

The Missouri Historical Society holds the Merriwether Lewis Collection (A0897).

The Manuscripts Department of the APS also houses:

  1. Journal of John Ordway, 1804-1806 ( Call no. 917.3 Or2).
  2. Journal of Meriwether Lewis, 1803 ( Call no. 917.3 L58p).
  3. Journal of William Clark, 1806 ( Call no. 917.3 L58cl).
  4. Journal of William Clark, 1808 ( Call no. 917.3 L58c).
  5. Nicholas Biddle, "Notes of queries to William Clark, with replies," 1810 ( Call no. 917.3 L58b).
  6. Nicholas Biddle, Correspondence concerning the Lewis and Clark Expedition ( Call no. Film 1319).
  7. Charles Willson Peale sketches of Lewis and Clark specimens (Quail, Louisiana tanager, Horned lizard, Lewis' woodpecker)( Call no. B P31).
  8. William Lingelbach, Documents concerning the William Clark Papers discovered in 1953 ( Call no. 917.3 L58x).

Bibliography

The major editions of the journals of Lewis and Clark include:

Paul Allen, ed., History of the Expedition Under the Command of Captains Lewis and Clark : to the Sources of the Missouri, Thence Across the Rocky Mountains and Down the River Columbia to the Pacific Ocean : Performed During the Years 1804-1805-1806, 2 vols. (Philadelphia: Bradford and Inskeep, 1814). Call no.: 917.3 L58.a

Elliot Coues, ed., History of the Expedition Under the Command of Captains Lewis and Clark : to the Sources of the Missouri, Thence Across the Rocky Mountains and Down the River Columbia to the Pacific Ocean : Performed During the Years 1804-1805-1806, 4 vols. (New York: Francis P. Harper, 1893) . Call no.: 917.3 L58c

Reuben G. Thwaites, ed., Original Journals of the Lewis and Clark Expedition, 1804-1806, 8 vols. (New York: Dodd and Mead, 1904-1905). Call no.: 917.3 L582o

Gary E. Moulton, ed., The Journals of the Lewis and Clark Expedition, 11 vols. (Lincoln: University of Nebraska Press, 1983- ). Call no.: 917.3 L58j.m

Donald Jackson, ed., Letters of the Lewis and Clark Expedition, With Related Documents, 1783-1854 (Urbana, Illinois: University of Illinois Press, 1962). Call no.: 917.3 L58Lj

Patrick Gass, A Journal of the Voyages and Travels of a Corps of Discovery : Under the Command of Captain Lewis and Captain Clarke of the Army of the United States. (Philadelphia: Zadok Cramer, 1807). Call no.: 917.3 G21

Early American History Note

The Lewis and Clark Journals are among the APS's most treasured and well-known collections. MOLE contains a detailed inventory of the collection.

Indexing Terms

Genre(s)

  • Crayon drawings
  • Journals (notebooks)
  • Maps
  • Sketches.
  • Travel Narratives and Journals

Geographic Name(s)

  • Louisiana Purchase--Discovery and exploration
  • United States--Exploring expeditions
  • West (U.S.)--Description and travel

Personal Name(s)

  • Bertin, Exupère Joseph
  • Clark, William, 1770-1838
  • Lewis, Meriwether, 1774-1809

Subject(s)

  • Chinook Indians
  • Early National Politics
  • Exploration
  • Indians of North America
  • Indians of North America--Missouri
  • Indians of North America--Montana
  • Indians of North America--North Dakota
  • Indians of North America--Oregon
  • Lewis and Clark Expedition (1804-1806)
  • Mandan Indians
  • Missouri Indians
  • Native America
  • Natural history
  • Northwest Coast Indians
  • Oto indians
  • Plains Indians
  • Plateau Indians
  • Salish Indians
  • Shoshoni Indians
  • Sihasapa Indians
  • Travel


Detailed Inventory
Volume I.
  Request Series
Codex A
  1 volume Request Subseries
Clark, William, 1770-1838.
Codex Cover
1804 May 13-Aug. 14 Page  cover
Request Item
Clark, William, 1770-1838.
Missouri distances to Big Sioux river
n.d. Page  inside front cover
Request Item
Clark, William, 1770-1838.
Memo of wintering
n.d. Page 1
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Clark, William, 1770-1838.
Memo of country
n.d. Page 2
Request Item
Clark, William, 1770-1838.
Journal
1804 May 13-Aug. 14 Page  3-179
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St. Charles exploration
1804 May 14 Page 4
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Manitou on a rock
1804 June 5 Page 34
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Meeting a group of Native Americans
1804 Aug. 3 Page 155
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Clark, William, 1770-1838.
Latitudes
n.d. Page  180-181
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Clark, William, 1770-1838.
Astronomical observations
n.d. Page  182-183
Request Item
Clark, William, 1770-1838.
Memo of badger
n.d. Page 184
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Clark, William, 1770-1838.
Astronomical observations
n.d. Page  inside back cover
Request Item
Codex Aa
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Journal (fragment)
1804 May 20 and 15 Page  1-8
Request Item

Elliot Coues found this fragment fastened to the inside cover of Codex C with red sealing wax.

Codex B
  1 volume Request Subseries
Clark, William, 1770-1838.
Memo of curious bird
n.d. Page 2
Request Item
Clark, William, 1770-1838.
Journal
1804 Aug. 15-Oct. 3 Page  3-178
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Death of Sgt. Floyd, page 1
1804 Aug. 20 Page 13
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Death of Sgt. Floyd, page 2
1804 Aug. 20 Page 14
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Soues River
1804 Aug. 21 Page 15
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Clark, William, 1770-1838.
Memo of Indians and pay due men
1804 Page 2
Request Item
Codex Ba
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Journal (fragment)
1804 Sep. 16-17 Page  1-8
Request Item

Elliot Coues found this fragment loose.

Codex C
  1 volume Request Subseries

The volume follows normal pagination through page 214. After this, entries begin from the back and follow reverse pagination.

Clark, William, 1770-1838.
Indian memoranda
n.d. Page  inside front cover
Request Item
Clark, William, 1770-1838.
Botanical memoranda
n.d. Page 1
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Clark, William, 1770-1838.
Journal
1804 Oct. 1-1805 Feb. 2 Page  2-160
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War hatchet
1805 Jan. 28-29 Page 158
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Lewis, Meriwether, 1774-1809.
Journal
1805 Feb. 3-13 Page  160-174
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Entries during Clark's absence hunting.

Battle ax
1805 Feb. 5 Page 165
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Clark, William, 1770-1838.
Journal of hunting trip
1805 Feb. 3-13 Page  174-177
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Clark, William, 1770-1838.
Journal
1805 Feb. 14-Mar. 21 Page  178-198
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Lewis, Meriwether, 1774-1809.
Journal
1805 Mar. 16 Page  199-202
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Clark, William, 1770-1838.
Journal
1805 Mar. 22-Apr. 7 Page  202-214
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Leave Fort Mandan

Clark, William, 1770-1838.
Memoranda of British forts
n.d. Page  inside back cover
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Clark, William, 1770-1838.
Bailing invoice of sundries for Indian presents, stores, etc.
n.d. Page  274-256
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Bailing Invoice (excerpt)
ca. 1804-1805 Page  273-272
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Clark, William, 1770-1838.
Sketch of Red River and St. Peters.
[1804-1805 Winter] 1 map, 20.3 x 12 cm Page 255
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Clark, William, 1770-1838.
Summary statement of the rivers, etc.
n.d. Page  253-248
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Clark, William, 1770-1838.
Distances of sundry places, St. Louis to Mandan
n.d. Page 247
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Clark, William, 1770-1838.
Weather diary
1804 Jan. 1-1805 Apr. 7 Page  248-216
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Volume II.
  Request Series
Codex D
  1 volume Request Subseries
Lewis, Meriwether, 1774-1809.
Journal
1805 Apr. 7-May23 Page  3-139
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Encounter with a grizzly bear, page 1
1805 Apr. 29 Page 66
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Encounter with a grizzly bear, page 2
1805 Apr. 29 Page 67
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Encounter with a grizzly bear, page 3
1805 Apr. 29 Page 68
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Encounter with a grizzly bear, page 4
1805 Apr. 29 Page 69
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First use of name Sah-ca-gah-wea (Sacagawea)
ca. 1805 Apr.-May Page 131
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Lewis, Meriwether, 1774-1809.
Weather diary
1805 June Page 140
Request Item

This page is the concluding page of a weather diary for June 1805, which was written in reverse pagination at the back of the journal. Five leaves, p. 141-152 (weather diary for Apr., May, and June 1805) are torn out and are now located in Codex Fe.

Codex E
  1 volume Request Subseries
Lewis, Meriwether, 1774-1809.
Journal
1805 May 24-Jul. 16 Page  1-156
Request Item
Lewis, Meriwether, 1774-1809.
Draught of the falls and portage of the Missouri River
ca. 1805 Jul. 4 1 map, 40.6 x 12 cm Page  132-133
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Codex F
  1 volume Request Subseries
Lewis, Meriwether, 1774-1809.
Journal
1805 Jul. 17-Aug. 22 Page  1-154
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Latitude measurements and descriptions of the Missouri River
1805 Jul. 27-28 Page 40
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Shoshone smoking pipe
1805 Aug. 13 Page 99
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Lewis' contemplative entry (birthday), p.1
1805 Aug. 18 Page 128
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Lewis' contemplative entry (birthday), p.2
1805 Aug. 18 Page 129
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Lewis' contemplative entry (birthday), p.3
1805 Aug. 18-19 Page 130
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Shoshone fish weir
1805 Aug. 21 Page 147
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Codex Fa
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Journal fragment
1805 Aug. 1-4 Page  1-8
Request Item

Coues notes, "This is practically a duplicate of Aug. 1-4 in Codex F, p. 52-65, so far as Lewis' separate reconnaisance of those days is concerned. But it does not give the corresponding matter for Clark Aug. 1-4, for whom see Codex G."

Codex Fb
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Journal fragment
1805 Aug. 23-26 Page  1-26
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"The Shoshone fragment of Lewis' Journal. Found loose."

Codex Fc
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Journal fragment
1805 Sep. 9-10 Page  1-4
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Codex Fd
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Journal fragment
1805 Sep. 18-22 Page  1-8
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Codex Fe
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Weather diary fragment
1805 Apr.-Sep. Page  1-16
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For remarks for June 1805, see Codex D, p. 140.

Hailstorm description
1805 Jul. 6 Page 14
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Diary of the weather for the month of July 1805
1805 Jul. Page 15
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Codex G
  1 volume Request Subseries
Clark, William, 1770-1838.
Distances and latitudes
n.d. Page  1 and fly leaf
Request Item
Clark, William, 1770-1838.
Journal
1805 Jul. 1-Oct. 10 Page  2-150
Request Item
Volume III.
  Request Series
Codex H
  1 volume Request Subseries
Biddle, Nicholas, 1786-1844.
Memo of maps
n.d. Page  fly leaf
Request Item
Clark, William, 1770-1838.
Colored sketch of Great Falls of the Columbia River
1805 Oct. 22-23 1 map, 20.3 x 12.7 cm Page 1
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Clark, William, 1770-1838.
Colored sketch of Long and Short Narrows of the Columbia River
1805 Oct. 22-28 1 map, 40.6 x 12 cm Page  2-3
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Clark, William, 1770-1838.
Colored sketch of Great Chute of the Columbia River
1805 Oct. 30-Nov. 2 1 map, 20.3 x 12 cm Page 4
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Clark, William, 1770-1838.
Journal
1805 Oct. 11-Nov. 19 Page  5-152
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Clark, William, 1770-1838.
Confluence of Snake and Columbia Rivers
ca. 1805 Oct. 18 1 map, 12 x 20.3 cm Page 33
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Latitude measurements and description of a river
1805 Nov. 7-8 Page 147
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Codex I
  1 volume Request Subseries

The volume follows normal pagination through page 144. After this, entries begin from the back and follow reverse pagination.

Clark, William, 1770-1838.
Estimated distances from Fort Mandan to mouth of the Columbia River
n.d. Page  2-12
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Tongue Point, Oregon
1805-1806 Winter Page 11
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Clark, William, 1770-1838.
Diary of the weather
1805 Apr.-1806 Jan. Page  13-33
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Clark, William, 1770-1838.
Journal
1805 Nov.19 - 1806 Jan. 29 Page  34-144
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Christmas, Wednesday 25th December, 1805
1805 Dec. 25 Page 76
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Conic hat
1805 Dec. 29 Page 80
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Arrow
1806 Jan. 15 Page 119
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Bone fishhook and line
1806 Jan. 16 Page 122
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Conic hat and double-edged knife
1806 Jan. 29 Page 144
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Clark, William, 1770-1838.
List of traders at mouth of Columbia River
n.d. Page 156
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Clark, William, 1770-1838.
Estimate of Western Indians
n.d. Page  155-147
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Clark, William, 1770-1838.
Mouth of the Columbia River (Cape Disappointment)
1805 Nov. 16-25 1 map, 20.3 x 12 cm Page 152
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Clark, William, 1770-1838.
Journal fragment
1806 Jan. 1-3 Page  146-145
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Codex Ia
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Journal fragment
1805 Nov. 29-Dec. 1 Page  1-10
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Rough notes from when Lewis left Clark near the mouth of the Columbia for a few days to examine the southwest side.

Lewis, Meriwether, 1774-1809.
Point Adams, Oregon
1805 Dec. 1 1 map, 16.5 x 9.5 cm Page 7
Request Item
Codex J
  1 volume Request Subseries

The volume follows normal pagination through page 145. After this, entries begin from the back and follow reverse pagination.

Lewis, Meriwether, 1774-1809.
Codex Cover
1806 Jan. 1-Mar. 20 Page  cover
Request Item
Lewis, Meriwether, 1774-1809.
Sketches of Indian implements
1806 Jan. 1 Page 1
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Lewis, Meriwether, 1774-1809.
Journal
1806 Jan. 1-Mar. 20 Page  3-145
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Fort Clatsop

Arrow
1806 Jan. 15 Page 25
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Bone fishhook and line
1806 Jan. 16-17 Page 28
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Digging instrument
1806 Jan. 23-25 Page 40
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Conic hat and double-edged knife
1806 Jan. 29-31 Page 48
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Paddle, small canoe, canoe with high bow, and most common canoe
1806 Feb. 1 Page 52
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Canoe with carved images
1806 Feb. 1 Page 53
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Elk hunting entry
1806 Feb. 3 Page 56
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Fir leaf (Pseudotsuga taxifolia, Douglas fir)
1806 Feb. 9 Page 65
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Maple leaf (Acer circinatum, vine maple)
1806 Feb. 10 Page 66
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Fern leaf (Polystichum munitum, Christmas fern)
1806 Feb. 13 Page 71
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Head of a vulture (Gymnops californianus, California condor)
1806 Feb. 16 Page 80
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Pine cone (Picea sitchensis, Sitka spruce)
1806 Feb. 18-19 Page 83
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Eulachon (Thaleichthys pacificus)
1806 Feb. 24 Page 93
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Head of the Cock of the Plains (Centrocerus urophasianus, sage grouse)
1806 Mar. 2-3 Page 107
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Head of a white gull (Fulmarus glacialis, northern fulmar)
1806 Mar. 7 Page 115
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Head of a brant (Anser albifrons, greater white-fronted goose)
1806 Mar. 15 Page 131
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White salmon trout (Oncorhynchus kisutch, coho salmon)
1806 Mar. 16 Page 133
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Lewis, Meriwether, 1774-1809.
Weather diary
1806 Jan.-Mar. Page  152-145
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Miscellaneous remarks for January 1806
1806 Jan. Page 151
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Codex K
  1 volume Request Subseries

The volume follows normal pagination through page 147. After this, entries begin from the back and follow reverse pagination.

Lewis, Meriwether, 1774-1809.
Journal
1806 Mar. 21-May 23 Page  1-147
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Iron scimitar
1806 Mar. 29 Page 14
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Lewis, Meriwether, 1774-1809.
Confluence of Willamette and Columbia Rivers and environs
1806 Apr. 3 1 map, 20.3 x 12 cm Page  28-29
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Two views of a canoe
1806 Apr. 6 Page 33
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Plan of a Chinookan house
1806 Apr. 6 Page 39
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Bone fishhook
1806 Apr. 26 Page 83
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Fish net
1806 May 18 Page 139
Request Item
Lewis, Meriwether, 1774-1809.
Weather diary
1806 Apr.-May Page  152-147
Request Item
Volume IV.
  Request Series
Codex L
  1 volume Request Subseries
Lewis, Meriwether, 1774-1809.
Astronomical memo
1806 June 9 Page  flyleaf
Request Item
Lewis, Meriwether, 1774-1809.
Journal
1806 May 24-Jul. 4 Page  1-80
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Lewis, Meriwether, 1774-1809.
Blank
n.d. Page  81-98
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These pages left blank by Lewis for insertion of fragment of Journal 1806 Jul. 5-14. See Codex La

Lewis, Meriwether, 1774-1809.
Journal
1806 Jul. 15-Aug. 8 Page  99-144
Request Item

Page 144 calls for a supplement. This supplement is Codex Lb

Lewis, Meriwether, 1774-1809.
Weather diary
1806 Jun.-Aug. Page  145-150
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Lewis, Meriwether, 1774-1809.
Memo of Dickson and Hancock
n.d. Page  flyleaf
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Codex La
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Journal fragment
1806 Jul. 3-15 Page  1-18
Request Item

This fragment is written on different paper from that of any of the bound journals or notebooks. It includes the discovery of the pass later known as Lewis and Clark's. Lewis left pages 81-98 of Codex L blank for insertion of these pages.

Monture (Seaman's) Creek, Powell County, Montana
1806 Jul. 5 Page 4
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Codex Lb
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Journal fragment
1806 Aug. 9-12 Page  1-6
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Lewis calls for this supplement in Codex L, p. 144.

Codex M
  1 volume Request Subseries
Clark, William, 1770-1838.
Chopunnish Indian sketch map of Snake, Salmon, etc. rivers
1806 May 28-31 1 map, 40.6 x 12 cm Page  1-2
Request Item
Clark, William, 1770-1838.
Journal
1806 Jun. 7-Aug. 14 Page  3-145
Request Item
Clark, William, 1770-1838.
Weather diary
1806 Jun.-Aug. Page  146-152
Request Item
Clark, William, 1770-1838.
Memo of distances
n.d. Page 154
Request Item
Codex N
  1 volume Request Subseries

The volume follows normal pagination through page 85. After this, entries begin from the back and follow reverse pagination.

Clark, William, 1770-1838.
Memo of articles forwarded from St. Louis to Louisville, Kentucky
1806 Page  1-2
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Clark, William, 1770-1838.
Journal
1806 Aug. 15-Sep. 26 Page  3-78
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Meeting with a Native American chief
ca. 1806 Aug.-Sep. Page 10
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Clark, William, 1770-1838.
Sketch of Ancient Fortification
1806 Sep. 1 Page  81-82
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Bon Homme Island on the Missouri River
1806 Sep. 1 Page 81
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Bon Homme Island on the Missouri River
1806 Sep. 1 Page 82
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Clark, William, 1770-1838.
Description of Ancient Fortification
n.d. Page  83-85
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Clark, William, 1770-1838.
Botanical and zoological notes
n.d. Page  154-153
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Clark, William, 1770-1838.
Weather diary
1806 Sep. Page  152-151
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Clark, William, 1770-1838.
Clark's River to the Missouri-Medicine confluence
1806 Jul. 3-11 1 map, 40.6 x 12 cm Page  150-149
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Clark, William, 1770-1838.
Courses and distances from Travelers Rest Creek to Falls of Missouri
n.d. Page  148-144
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Clark, William, 1770-1838.
Summary of the statement of the rivers, etc.
n.d. Page  142-133
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Clark, William, 1770-1838.
Summary statement of the Yellowstone
1806 Page  132-131
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Clark, William, 1770-1838.
Portage from Yellowstone to 3 Forks
n.d. Page  130-129
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Clark, William, 1770-1838.
Various notes
n.d. Page  128-122
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Codex O
  1 volume Request Subseries
Lewis, Meriwether, 1774-1809.
Description of astronomical instruments
1804 Jul. 22 Page  1-6
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Lewis, Meriwether, 1774-1809.
Astronomical observations
1804 May 18-1805 Mar. 30 Page  6-52
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Point of observation no. 14
1804 Jun. 27 Page 7
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Lewis, Meriwether, 1774-1809.
Summary view of rivers and creeks from the mouth of the Missouri upward
1806 June 9 Page  69-128
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Volume V.
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Codex P
  1 volume Request Subseries

The volume follows normal pagination through page 124. After this, entries begin from the back and follow reverse pagination.

Lewis, Meriwether, 1774-1809.
Memo of weather
1804 Feb. 28-Mar. 28 Page  flyleaf and 1
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Lewis, Meriwether, 1774-1809.
Description of astronomical instruments
1804 Jul. 22 Page  1-6
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Biddle, Nicholas, 1786-1844.
Memo of Jefferson deposit
n.d. Page 1
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Unidentified.
Various zoological and botanical notes
1805 Apr. 9-1806 Feb. 17 Page  13-124
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Lewis, Meriwether, 1774-1809.
Money accounts, cancelled
1804 Page  flyleaf
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Lewis, Meriwether, 1774-1809.
Miscellaneous memo
n.d. Page 133
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Lewis, Meriwether, 1774-1809.
Weather diary
1805 Jul.-Sep. Page  131-125
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Codex Q
  1 volume Request Subseries
Lewis, Meriwether, 1774-1809.
Natural history notes
1804 Aug. 2-1805 May 9 Page  4-56
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Clark, William, 1770-1838.
Natural history notes
1804-1806 Page  57-181
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Codex R
  1 volume Request Subseries
Biddle, Nicholas, 1786-1844.
Memo of Jefferson deposit (torn)
n.d. Page 2
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Lewis, Meriwether, 1774-1809.
Botanical register: list of plants no. 1-108
1804 May 10-Nov. 17 Page  4-49
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"Convolvalist" leaf (Convulvulus sepium, hedge bindweed)
1804 Jul. 17 Page 37
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Lewis, Meriwether, 1774-1809.
Zoological notes, Fort Clatsop
1805 Dec. 18 Page  50-53
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Clark, William, 1770-1838.
Botanical and zoological notes, Fort Clatsop
1806 Feb. 18-Mar. 11 Page  59-162
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Lewis, Meriwether, 1774-1809.
Memo of "lava"
n.d. Page 163
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Lewis, Meriwether, 1774-1809.
Word "mineralogy" and memo of a bird
n.d. Page  inside back cover
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Codex S
  1 paper enclosure Request Subseries
Lewis, Meriwether, 1774-1809.
Rough draft of letter to Thomas Jefferson annoucing return of the Expedition to St. Louis.
1806 Sep. 23 Page  1-11
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Lewis, Meriwether, 1774-1809.
Rough draft of letter to Thomas Jefferson (partial)
1806 Sep. 21 Page  12-16
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Codex T
  1 paper enclosure Request Subseries
Unidentified.
Fragment describing journey
n.d. Page  12-16
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Volume VI.
  Request Series
Lewis, Meriwether, 1774-1809 and Clark, William, 1770-1838.
Diary
1804 Jan.1-1805 Apr. 9 1 volume Request Item

Contains meterological observations and accounts of distances traveled.

Abbreviations of weather and river observations
1804 Jan. 1 Page  1-2
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Volume VII.
  Request Series
Clark, William, 1770-1838.
A list of the names of the different nations and tribes of Indian inhabiting the country on the Missouria...
n.d. 1 large sheet Extra oversize
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Obverse
n.d. Page  obverse
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Reverse
n.d. Page  reverse
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Clark, William, 1770-1838.
Estimate of the Western Indians
n.d. 4 pages Request Item

The reverse of page 1 features a draft of the map that appears in Codex N:81-82.

Access digital object:
http://diglib.amphilsoc.org/fedora/repository/graphics:2881

Vaughan, John, 1756-1841.
Receipts of deposit of Lewis and Clark material to the American Philosophical Society
1818 5 pages Request Item
Coues, Elliott, 1842-1899.
Letter requesting to borrow the journals to prepare a new edition of the "Travels of Lewis and Clark."
1892 Dec. 16 5 pages Request Item
Peale, Charles Willson, 1741-1827.
The Fisher
n.d. 1 sketch Request Item
Volume VIII.
  Request Series
Clark, William, 1770-1838.
The country and rivers in advance or above the Mandans
1805 2 pages Request Item

Cf. Codex O:117-118

Clark, William, 1770-1838.
A slight view of the Missouri River
n.d. 4 pages Request Item
Clark, William, 1770-1838.
A summary statement of the river and creeks which fall into the Missouri
n.d. 12 pages Request Item

Cf. Codex O:69-116

Clark, William, 1770-1838.
Multonomah River (fragment)
n.d. 1 map, 35.6 x 9.5 cm Request Item
Clark, William, 1770-1838.
A description of the Indian nations
n.d. 4 pages Request Item
Clark, William, 1770-1838.
A statistical view of the Indian nations inhabiting the territory of Louisiana and the countries adjacent
n.d. 1 page Request Item
Captain McKay and John Hay.
[Handwritten transcription] Extracts from Capt. McKay's journal with notes by John Hay.
n.d. 12 pages Request Item
Clark, William, 1770-1838.
Memorandum replying to questions of Nicholas Biddle
n.d. 1 page Request Item
Lewis, Meriwether, 1774-1809.
Memoranda pertaining to the expedition.
n.d. 2 pages Request Item

Contains notes on several Indian nations. Originally found in Ordway's Journal, volume 2 (917.3 Or2)

Volume IX.
  Request Series
Lewis, Meriwether, 1774-1809.
Donation book containing a list of dried leaves etc. collected in the far West by Merriwether Lewis
n.d. 1 paperbound volume Request Item

collected in the far west. List of specimens, boxed, Jan.11, 1884, at the A.P.S. by Michael Carraher, in envelope in front of book.