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Abstract

A Polish-born mathematician who worked in symbolic logic, set theory and computation theory, Emil Leon Post received his doctorate from Columbia in 1920 for a dissertation proving the consistency of the propositional calculus described in Whitehead and Russell's Principia mathematica. He joined the faculty at City College of the City University of New York in 1932, where he remained until his death in 1954. Although illness continually interrupted Post's career, he made important contributions to the concepts of completeness and consistency and to recursive functions, foundational to modern computing theory. In 1936, he introduced the concept of a "Post machine," a sort of precursor to the von Neumann's notion of a program. The Post Papers consist of 8 linear feet of professional correspondence, research notes, and papers, to which have been added a small number of items of biographical interest.

Background note

Emil L. Post was born in Poland in 1897. At the age of seven he emigrated with his mother and sisters to New York, where his father worked in the successful family clothing and fur business.

As a child growing up in Harlem, Post was especially interested in astronomy. Tragically, before age thirteen he lost his left arm in an accident. Post wrote to several observatories asking whether his handicap would exclude him from the profession of astronomy. While the response from Harvard College Observatory was encouraging ("there is no reason why you may not become eminent in astronomy"), the superintendent of the U.S. Naval Observatory wrote that "in my opinion the loss of your left arm would be a very serious handicap to your becoming a professional astronomer. In observational work with instruments the use of both hands is necessary in all the work of this observatory." Discouraged, Post turned his intellect away from the heavens and toward mathematics.

After graduating from Townsend Harris High School, Post entered City College of New York. By the time he received a B.S. in mathematics in 1917, Post had already done much of the work for a paper on generalized differentiation that was eventually published in 1930. From 1917-1920 Post was a graduate student at Columbia University. His doctoral dissertation involved the mathematical study of systems of logic, specifically the application of the truth table method to the propositional calculus of Whitehead and Russell's Principia Mathematica. Post was able to show that the axioms of propositional calculus were both complete and consistent with respect to the truth table method. This dissertation was to help form the foundation of modern proof theory.

Post spent the 1920-1921 academic year at Princeton on a post-doctoral fellowship. It was during this period that he continued to analyze the Principia Mathematica and began to grapple with a revolutionary idea that would become famous in the 1930s: the fundamental incompleteness of any formal logic. Unfortunately for Post, his early formulations were fragmentary and as he struggled to work them out, Kurt Gödel, who had no knowledge of Post's work, announced his landmark "incompleteness theorem" in 1931. When Alonzo Church published "An Unsolvable Problem of Elementary Number Theory" in 1936, Post's work, which remained unpublished, lost its claim to originality. In a 1938 letter to Gödel, a disappointed but gracious Post remarked that "any resentment I may have is at the Fates if not myself.... I have the greatest admiration for your work, and after all it is not ideas but the execution of ideas that constitute a mark of greatness."

In 1921 Post suffered his first attack of manic-depressive illness, a condition which was to reoccur throughout his life, often at the peak of creative periods. He recovered from this first occurrence well enough to begin teaching at Cornell, but after another collapse he found himself unemployed and unwanted in academia. For years he survived by teaching high school in New York. In 1932, Post began teaching at City College of New York, where he stayed for the rest of his career. Despite a treatment regimen that limited research time and a teaching load of sixteen hours per week, he continued to produce important papers.

In 1936 Post contributed a paper to the first issue of the Journal of Symbolic Logic entitled "Finite Combinatory Processes--Formulation I." This paper had much in common with Alan Turing's work on a universal computing machine. While Turing's work described the mechanics of such a machine, Post focused on the instructions, or "software," that would make the machine work. Post was able to prove that all computational processes could be reduced to a set of instructions that manipulated two symbols, "0" and "1."

Post's most influential mathematical work arose out of an address given to the American Mathematical Society in 1943. His paper on recursively enumerable sets, published in 1944, spawned a series of investigations on completeness and simplicity in set theory.

As a teacher at City College during the 1930s and 1940s, Post had a reputation as a demanding yet fair instructor. His classes were organized to the minute, and he did not encourage questions from his students. Still, he was a popular teacher who had many students go on to become professional mathematicians.

Post continued to struggle with manic depression throughout his career. In 1954, after a period of fairly good health, he became ill for the last time. He died of a heart attack shortly after being treated with electro-shock therapy in an upstate New York hospital. He was survived by his wife, Gertrude Singer Post (1900-1956) and his daughter, Phyllis Post Goodman.

Scope and content

The Emil Leon Post Papers (1888-1995) contain correspondence, subject files, manuscripts of published and unpublished works by Post, research notes by Post, materials gathered by Post's daughter, Phyllis Post Goodman, and photographs, which document Post's career as a mathematician.

The papers (8 boxes; 4 linear feet) are divided into six series:

Series I. Correspondence, 1912-1955(2 boxes; 0.75 linear feet)
Series II. Subject Files, 1888-1955(1 box; 6 folders)
Series III. Works by Post, 1921-1953(2 boxes; 0.25 linear feet)
Series IV. Research Notes, 1917-1953(6 boxes; 2.75 linear feet)
Series V. Materials Gathered by Phyllis Post Goodman, 1955-1995(1 box; 0.25 linear feet)
Series VI. Photographs, 1924, 1948(1 box, 3 folders)

Arrangement

Each series is arranged alphabetically by folder title and then chronologically within each folder.

Collection information

Provenance

The Post notebooks were donated by Martin Davis in 1986 (Accession 1986-332ms). The remaining Post Papers were donated to the APS by Phyllis Post Goodman in 1992 (Accession 1992-1345ms and 1992-1088ms) and 1994 (Accession 1994-99ms, 1994-367ms, and 1994-238ms). It is expected that further additions may be made to this collection.

Preferred citation

Cite as: Emil Post Papers, American Philosophical Society.

Processing information

Catalogued by Eric Hinsdale, Mellon Summer Intern, and Peniel E. Joseph, Mellon Summer Intern, Supervised by Miriam B. Spectre, Senior Processing Archivist, April 1995.

Separated material

All photographs have been removed from Series I-V and placed in Series VI, with cross-references added in the original series. Reprints have been moved to the Printed Materials Department of the APS library. If a reprint was found as an enclosure, a photocopy of the title page was filed in its place.

Bibliography

Emil Post, Solvability, Provability, Definability : the Collected Works of Emil L. Post Boston : Birkhäuser, 1994 Call no.: 510 P84s.

Indexing Terms

Corporate Name(s)

  • American Mathematical Society.
  • City University of New York. City College

Genre(s)

  • Drawings.
  • Journals (notebooks)

Personal Name(s)

  • Church, Alonzo, 1903-
  • Davis, Martin, 1928-
  • Godel, Kurt
  • Post, Emil Leon, 1897-1954
  • Quine, W. V., (Willard Van Orman)

Subject(s)

  • Algorithms
  • Eugenics--United States
  • Logic, Symbolic and mathematical
  • Set theory
Collection overview
1912-1955 2 boxes; 0.75 linear feet

Correspondence from City College colleagues, former students, and academic institutions. Letters of reference are filed under the name of the person who is the subject of the letter. The series is arranged alphabetically by correspondent's name and then chronologically within each folder. There are a few handwritten postcards from Post to Martin Davis, as well as handwritten recommendations for others. The bulk of the correspondence, however, is from other people, including several letters from leading figures in the field of mathematics such as Kurt Gödel and Alonzo Church. Most of the correspondence deals with mathematics and recommendations; however, there are a few letters from government officials (including someone from the office of President Eisenhower) in response to Post's suggestions on various aspects of world events.

Correspondents in Series I include:

  • Church, Alonzo
  • Davis, Martin
  • Gödel, Kurt
  • Quine, Willard

1888-1955 1 box; 6 folders

Includes appointments and awards, a biliography of Post's works, family history, an unidentified mailing list, letters of condolence on Post's death, and materials about teaching. The folders are arranged alphabetically by title. The earliest materials in this series are photocopies of family documents.

1921-1953 2 boxes; 0.25 linear feet

Original typed drafts of several of Post's papers on logic. This series also includes an annotated draft of Post's "Absolutely Unsolvable Problems." Also included are galley prints and notes for published papers.

1917-1953 6 boxes; 2.75 linear feet

Post's notebooks concerning various aspects of mathematical research, beginning with a notebook from 1917. The notebooks serve as a mathematical diary that covers Post's life as a mathematician.

1955-1995 1 box; 0.25 linear feet

Letters, articles, and documents concerning Emil L. Post that were collected after his death. Of special interest is material concerning the republication of works by Post in Solvability, Provability, Definability: The Collected Works of Emil L. Post, edited by Martin Davis (Boston: Birhäuser, 1994) and the establishment of the Emil L. Post mathematical award at City College.

1924, 1948 1 box, 3 folders

Photographs of sketches (n.d.) by Emil L. Post (the original sketches are in the possession of Phyllis Post Goodman). Also in this series is a photograph (June 1924) of Post as a young man; this photograph is one of the only formal portraits ever taken of Post. The remaining photograph is a portrait of one of Post's students.



Detailed Inventory
Series I. Correspondence
1912-1955 2 boxes; 0.75 linear feet

Correspondence from City College colleagues, former students, and academic institutions. Letters of reference are filed under the name of the person who is the subject of the letter. The series is arranged alphabetically by correspondent's name and then chronologically within each folder. There are a few handwritten postcards from Post to Martin Davis, as well as handwritten recommendations for others. The bulk of the correspondence, however, is from other people, including several letters from leading figures in the field of mathematics such as Kurt Gödel and Alonzo Church. Most of the correspondence deals with mathematics and recommendations; however, there are a few letters from government officials (including someone from the office of President Eisenhower) in response to Post's suggestions on various aspects of world events.

Correspondents in Series I include:

  • Church, Alonzo
  • Davis, Martin
  • Gödel, Kurt
  • Quine, Willard

Abrahams, Albert P.
1949 Box 1
Air Warden Service
1942 Box 1
American Journal of Mathematics
1941-1942 Box 1

Weyl, Hermann

The American Mathematical Monthly
1952 Box 1
American Mathematical Society
1943, 1954 Box 1
Annals of Mathematics
1940-1941, 1947 Box 1
Aumann, John
1950 Box 1
Bachiller, T.R.
1947-1948 Box 1

In French

Barany, Ronald
1949 Box 1
Beatty, S.
1950 Box 1
Berkowitz, J.
n.d. Box 1
Bernays, Paul
1946 Box 1
Bishop, Kenneth
1930 Box 1
Black, Max
1947 Box 1
Blan, Julian
1949 Box 1
Boone, William
1951 Box 1
Bricker, Jacob Leon
1952 Box 1
Brooklyn College
1946 Box 1
Brown, Cecil
1945 Box 1
Burroughs Adding Machine Company. Research Division
1952-1953 Box 1
Bushey, Hobart
1934 Box 1
Carmichael, R.D.
1952 Box 1
Chern, Bernard
1952 Box 1
Church, Alonzo
1927-1954 Box 1

See Also Ser.I, The Journal of Symbolic Logic

City College, New York
1941-1953 Box 1
City Club of New York
1942 Box 1
Columbia University
1952 Box 1
Craig, Homer
1955 Box 1
Craig, William
1954 Box 1
Davis, H.J.
1931 Box 1
Davis, Martin
1948-1952 Box 1
Dean, Richard
1948 Box 1
Dekker, J.C.E.
1949, 1952 Box 1
DeMendonca, Simao Carneiro
1951 Box 1
Douglas, Jesse
1940-1948 Box 1
Durrels, Julius
1951 Box 1
Ehunprcis, Leon
1950 Box 1
Eisenhower, Dwight D. (Office Of)
1952 Box 1
Elgop, Calvin
1952 Box 1
Engel, Joseph H.
n.d. Box 1
Engelman, Carl
1950 Box 1
Faulk, David H.
1944 Box 1
Feeney, Walter J.
1952 Box 1
Finkel, William L.
1949 Box 1
Fischer, Irwin
1948 Box 1
Fitch, Frederic
1948-1953 Box 1
Forndon, Wilfred A.
1950 Box 1
Frankel, Abraham
1949, 1951 Box 1
Freilich, Gerald
1946, n.d. Box 1
Gill, Bennington
1937, 1943 Box 1
Ginsburg, Jekuthial
1937, 1940, 1948 Box 1
Gödel, Kurt
1938-1939 Box 1
Gonseth, F.
1939, 1950 Box 1

Some in French

Gottschall, Morton
1944 Box 1
Grafton, Samuel
1945-1948 Box 1
Gugino, E.
1952 Box 1
Gutterman,
n.d. Box 1
Harvard College Observatory
1912 Box 1
Henricksen, Melvin
1948 Box 1
Himwich, A.A.
1929 Box 1
Hinshaw, Virgil
1947 Box 1
Hochfeld, Emmanuel
1951 Box 1
Iseki, Kiyosi
1940, 1944, 1946 Box 1
Javits, Jacob
1950 Box 1
Johnson, Edgar
1949 Box 1
The Journal of Symbolic Logic
1938, 1942, 1948 Box 1
Kasner, Edward
1940, n.d. Box 1
Kates, Robert
1951, n.d. Box 1
Kelley, Thomas W.
1951 Box 1
Keyser, C.J.
1930, 1940, 1941 Box 1
Kingdon, Frank
1946-1950, n.d. Box 1
Kleene, S.C.
1936-1954 Box 1
Kline, J.R.
1946 Box 1
Korngold, Eric
1949 Box 1
Lerner, Max
1947, 1950 Box 1
Lewis, C.I.
1940, 1944 Box 1
Linial, Samuel
1949 Box 1
Littauer, Sebastian
1928-1931, n.d. Box 1
Lorch, Lee
1949-1951, n.d. Box 1
Lubell, Albert
1937 Box 1
MacLane, Saunders
1941-1943 Box 1

See Also Ser.I, Bulletin of the American Mathematical Society

McLaughlin, Doris
1950 Box 1
Martin, Norman M.
1948 Box 1
Mathematical Reviews
1943 Box 1
Menger, Karl
1931, 1938 Box 1
Mischel, Theodore
1947 Box 1
Mostowski, Andrzej
1948 Box 1
Myrick, Jack A.
1952 Box 1
Myhill, John
n.d. Box 1
Neuwirth, Jerome H.
1952 Box 1
New York Post
1946 Box 1
New York University
1951 Box 1
Newman, Donald J.
1948-1952 Box 1
Orleans, Joseph B.
1937-1940 Box 1
Paley, Thomas
1950 Box 1
Pincherle, S.
1930 Box 1

In French

Pollack, Richard
1952 Box 1
Quine, Willard V.
1937, 1947 Box 1
Reynolds, Frederick G.
1937-1944 Box 2
Rich, Barnett
1950 Box 2
Richardson, Moses
1940-1941 Box 2
Ritt, J.F.
1931-1948 Box 2
Robbins, Leon C.
1951 Box 2
Rosenblatt, Murray
1946, 1950, n.d. Box 2
Rosser, J. Barkley
1953, n.d. Box 2
Rubel, Lee A.
1950 Box 2
Ruderman, Harry D.
1948 Box 2
Saurel, Paul
1932 Box 2
Scholz, Heinrich
1941-1948 Box 2
Schwartz, Jacob
1949 Box 2
Shapiro, Harold N.
1943-1949 Box 2
Sheridan, Peter
1950 Box 2
Shugar, Alvin C.
n.d. Box 2
Silverman, Abe
1951 Box 2
Simpson, Kenneth C.
1943 Box 2
Skolem, Th.
1946 Box 2
Solomon, Charles
1930, 1932, n.d. Box 2
Sonkin, Si
n.d. Box 2
Stephens, Eugene
1924, 1930 Box 2
Stevenson, Adlai
1952 Box 2
Syracuse University
1946 Box 2
Tarski, Alfred
1940-1948 Box 2
Thompson, Dorothy
1945-1946 Box 2
Turquette, A.R.
1942 Box 2
Unidentified
1947, 1951, n.d. Box 2

Some in French

The United Nations
1945 Box 2
United States Naval Observatory
1912 Box 2
United States. Secretary of State
1951 Box 2
United States. War Department
1948 Box 2
United States. White House
1951, 1953 Box 2
Vandiver, H.S.
1953 Box 2
Webb, Donald L.
1935-1938 Box 2
Weinstein, Philip K.
1939 Box 2
Weisner, Louis
1932 Box 2
Weissblum, Walter
1951 Box 2
Wernick, William
1942 Box 2
Weyl, Hermann
1944 Box 2

See Also Ser.I, American Journal of Mathematics

Widder, Dave V.
1948 Box 2
Wiener, Norbert
1923 Box 2
Wirth, Herbert P.
1937-1943 Box 2
Winter, Jacob
1939 Box 2
Wisan, Harold
1939 Box 2
Wohl, Sonia
1946 Box 2
Wouk, Arthur
n.d. Box 2
Series II. Subject Files
1888-1955 1 box; 6 folders

Includes appointments and awards, a biliography of Post's works, family history, an unidentified mailing list, letters of condolence on Post's death, and materials about teaching. The folders are arranged alphabetically by title. The earliest materials in this series are photocopies of family documents.

Appointments and Awards
1941, 1949 Box 2
Bibliography
1953 Box 2
Condolence Letters to Mrs. Post
1954-1955 Box 2
Family History
1888-1954, n.d. Box 2
Mailing List
n.d. Box 2
Teaching Miscellanea
1942-1953, n.d. Box 2
Series III. Works by Post
1921-1953 2 boxes; 0.25 linear feet

Original typed drafts of several of Post's papers on logic. This series also includes an annotated draft of Post's "Absolutely Unsolvable Problems." Also included are galley prints and notes for published papers.

"Absolutely Unsolvable Problems"
n.d. 2 folders Box 2
Calculus of Variation
n.d. Box 2
[Combinations]
1935 Box 2
"Degrees of Recursive Unsolvability"
1948-1952 Box 2
"Finite Combinatory Processes--Formulation I"
n.d. Box 2
"Formal Reductors of the General Combinatorial Decision Problem--Page Proofs"
1942 Box 2
"Formal Reductions of the General Combinatorial Decision Problem--Typescript"
n.d. Box 2
"A Fundamental Problem in Postulate Theory"
  Box 2

-See Ser.III, [Postulate Theory]

"The Generalized Derivative"
n.d. Box 2
"Generalized Differentiation"
1929 Box 2
[Laplace Transform and Generalized Differention]
1923, 1932 Box 2
[Logic and Set Theory]
  Box 2
Folder #1
1940-1949, n.d. Box 2

On index cards

Folder #2
1935, 1952 Box 2
"The Modern Paradoxes"
  Box 2

-See Ser.III, [Logic and Set Theory]

"New Ideas for Researches"
  Box 2

-See Ser.III, [Logic and Set Theory]

"Note on Functions Identically Equal to Their Variations"
  Box 2

-See Ser.III, [Calculus of Variation]

"Note on the Five Regular Polyhedra"
  Box 2

-See Ser.III, [Five Regular Polyhedra]

"On Arthur Schath's "Proof" of a Form of the Cont. Hyp."
  Box 2

-See Ser.III, [Logic and Set Theory]

"Polyadic Groups"--Proof (Corrected)
1940 Box 3
"Polyadic Groups"--Typescript
1935 Box 3
[Postulate Theory]
1921, 1935 Box 3
"Recursively Renumerable Sets of Positive Integers and Their Decision Problems"--Page Proofs
n.d. Box 3
Recursively Renumerable Sets of Positive Integers and Their Decision Problems"--Typescript
n.d. Box 3
"A Trifle"--Poem
1922 Box 3
"A Variant of a Recursively Unsolvable Problem"--Page Proofs
n.d. Box 3
"A Variant of a Recursively Unsolvable Problem"--Typescript
n.d. Box 3
Series IV. Research Notes
1917-1953 6 boxes; 2.75 linear feet

Post's notebooks concerning various aspects of mathematical research, beginning with a notebook from 1917. The notebooks serve as a mathematical diary that covers Post's life as a mathematician.

"Calculus of Finite Processes"
1944 Box 3

-See also Ser.IV, "Theory of Finite Processes" Vol. II-XVII

"Closed Truth Systems" Vol. I
1929-1930 Box 3
"Closed Truth Systems" Vol. II
1930 Box 3
"Closed Truth Systems" Vol. III
1930-1931 Box 3
"Closed Truth Systems" Vol. IV
1931-1932 Box 4
"Closed Truth Systems" Vol. V
1931 Box 4
"Complete Equivalence of Normal Set and Recursive Function Development"
1942-1945 Box 4
[Corrections of Unknown Manuscript]
n.d. Box 4
"Creative Logic" Vol. I
1938 Box 4
"Creative Logic" Vol. II
1938 Box 4
"Creative Logic" Vol. III
1939 Box 4
"Creative Logic" Vol. IV
1939 Box 4
"Creative Logic" Vol. V
1940-1941 Box 4
"Creative Logic" Vol. VI
1941-1942 Box 5
"Creative Logic" Vol. VII
1942-1945 Box 5
"Creative Logic" Vol. VIII
1945 Box 5
"Creative Logic" Vol. IX
1945 Box 5
"Creative Logic" Vol. X
1945 Box 5
"Creative Logic" Vol. XI
1945-1946 Box 5
"Creative Logic" Vol. XII
1946 Box 5
"Creative Logic" Vol. XIII
1946 Box 5
"Creative Logic" Vol. XIV
1947 Box 5
"Creative Logic" Vol. XV
1947 Box 6
"Creative Logic" Vol. XVI
1947-1948 Box 6
"Creative Logic" Vol. XVII
1948-1949 Box 6
"Creative Logic" Vol. XVIII
1949-1952 Box 6
"Definability" Vol. I
1952 Box 6
"Definability" Vol. II
1952-1953 Box 6
"The Logic of Mathematics"
  Box 6

-See Ser.IV, "Creative Logic"

[Math 6 Notes]
1917 Box 6
"Theory of Finite Processes" Vol. I
  Box 6

-See Ser.IV, "Calculus of Finite Processes" Vol. I

"Theory of Finite Processes" Vol. II
1942 Box 6
"Theory of Finite Processes" Vol. III
1942-1943 Box 6
"Theory of Finite Processes" Vol. V
1944 Box 7

(Vol. IV is missing from this collection)

"Theory of Finite Processes" Vol. VI
1944-1945 Box 7
"Theory of Finite Processes" Vol. VII
1945-1946 Box 7
"Theory of Finite Processes" Vol. VIII
1946 Box 7
"Theory of Finite Processes" Vol. IX
1946-1947 Box 7
"Theory of Finite Processes" Vol. X
1947-1948 Box 7
"Theory of Finite Processes" Vol. XI
1948 Box 7
"Theory of Finite Processes" Vol. XII
1948-1949 Box 7
"Theory of Finite Processes" Vol. XIII
1949 Box 7
"Theory of Finite Processes" Vol. XIV
1949-1950 Box 8
"Theory of Finite Processes" Vol. XV
1950 Box 8
"Theory of Finite Processes" Vol. XVI
1951 Box 8
"Theory of Finite Processes" Vol. XVII
1951 Box 8
Series V. Materials Gathered by Phyllis Post Goodman
1955-1995 1 box; 0.25 linear feet

Letters, articles, and documents concerning Emil L. Post that were collected after his death. Of special interest is material concerning the republication of works by Post in Solvability, Provability, Definability: The Collected Works of Emil L. Post, edited by Martin Davis (Boston: Birhäuser, 1994) and the establishment of the Emil L. Post mathematical award at City College.

Barber, Sherbourne F.
1994 Box 8
Birkhäuser
1990-1993 Box 8
Bungay, Richard
1960-1961 Box 8
City College Alumnus
1980-1981 Box 8
City College of New York
1957-1991 Box 8
Clippings
1954-1993, n.d. Box 8
Datamation
n.d. Box 8
Davids, Norman
1990 Box 8
Davis, Martin
1956-1994 Box 8
Dawson, John
1988, 1993, 1995 Box 8
Douglas, Jesse
1955 Box 8
Epstein, George
1994 Box 8
Erdos, Paul
1994 Box 8
Gleiser, Molly
1979-1987 Box 8
Grattan-Guinness, I.
1991 Box 8
Hodges, Andrew
1984 Box 8
Kennedy, Hubert
1972 Box 8
Kukin, Ira
1980 Box 8
Lorch, Lee
1990-1993 Box 8
Ozarow, Vivian
1990 Box 8
Princeton University Press
1969 Box 8
Rogner and Bernhard Publishing
1972 Box 8

Some in German

Rota, Gian-Carlo
1969 Box 8
Springer-Verlag Publishers
1979 Box 8
Sister Teresemarie
1976 Box 8
Series VI. Photographs
1924, 1948 1 box, 3 folders

Photographs of sketches (n.d.) by Emil L. Post (the original sketches are in the possession of Phyllis Post Goodman). Also in this series is a photograph (June 1924) of Post as a young man; this photograph is one of the only formal portraits ever taken of Post. The remaining photograph is a portrait of one of Post's students.

Berl, Sigmund
1948 Box 8
Post, Emil L.
Jun. 1924 Box 8
Emil Post, formal portrait, June 1924.
1924 June 1.0 Photograph(s)

Abstract: Bust length formal portrait of Post.

This item has been digitized:
http://diglib.amphilsoc.org/fedora/repository/graphics:3086

Photographs of Sketches by Emil L. Post
n.d. Box 8