These are letters from Jeremy Belknap, Aaron Dexter, Ezra Stile, Samuel Vaughan, Jr., and others. There are also drafts of some of Cutler's letters.

Miscellaneous letters from and to Benjamin Smith Barton, Nicholas Collin, Henry Muhlenberg, Jeremy Belknap, Monsieur Le Roi, and a broadside by Robert Aitken. These letters concern botany and zoology in the U.S., England, and on the Continent, and mention contemporary figures as well as the American Philosophical Society.

These letters, from the Wellcome Historical Medical Society's collections, are on a variety of topics, primarily natural history and medicine.