Letter from James Winthrop to William Bentley, 1784 February 8

Two folio-sized leaves containing a two-and-a-half-page handwritten letter from Winthrop to Bentley with a lengthy discussion on a recent comet and related calculations.

Letter from James Winthrop to William Bentley, 1784 February 16

Two folio-sized leaves containing a three-page handwritten letter from Winthrop to Bentley regarding comet calculations and a short criticism of the sermons of Samuel Cooper (1725-1783).