The annotated bibliography results from several months' search of the holdings of the American Philosophical Society's Library, and a thorough examination of each source's contents. I believe that there are additional significant travelers' accounts at the APS yet unlocated because one cannot expect card catalogues or manuscript finding aids to list all items, or to list them in terms which make all contents obvious. Several items on this list were located by clues, scholarly intuition, or hints from the Library's staff rather than clear references.
At the end of each bibliographic entry I have noted (if they are not apparent from the title of the document) the date of the account, whether it is accompanied by significant illustrations, and where the travel took place.
The terminal dates for this study derive from the collection strengths of the Library and from my own interests. I certainly believe that similar travelers' accounts up to the recent past (I think James Watson's The Double Helix fits the genre) are equally worthy of study.