Letter from George W. Lewis to William Tudor,

One letter inquiring if Tudor wished to send any letters to Boston with Lewis when he sailed.

Letter from James Winthrop to William Bentley, 1788 February 27

Two leaves containing a one-page handwritten letter from Winthrop to Bentley that mentions Rev. John Prince (1751-1836) and briefly discussing the state of Winthrop's microscope and five volumes presented to Harvard that were printed in Calcutta, India.

Letter from James Winthrop to William Bentley, 1788 May 21

Two octavo-sized leaves containing a one-page handwritten letter from Winthrop to Bentley briefly mentioning some books and an upcoming inspection of library books.

Letter from James Winthrop to William Bentley, 1788 July 19

Two folio-sized leaves containing a two-and-a-half-page handwritten letter from Winthrop to Bentley containing a "memorandum of the principles on which the pentagraph is constructed." The text includes two geometric diagrams.

Letter from James Winthrop to William Bentley, 1788 August 20

Two octavo-sized leaves containing a one-and-a-half-page handwritten letter from Winthrop to Bentley briefly mentioning his efforts to visit the "Hon. N. G." (Nathaniel Gorham) and some recent activities of the Academy.