- Manuscript copy of letter from Francis Mairez and David Cooper of Montego Bay, Jamaica, [to Samuel and William Vernon], sent via Captain George Sweet on the Brig Othello, regarding profits from slaves sold on the Vernon's behalf and other trade business. Followed by a second letter dated August 22, 1775, from Mairez and Cooper [to the Vernons] regarding their accounts current.
- Account record for the sale of 75 slaves from the cargo of the Brig Othello, sold by Captain George Dunbar Sweet for Samuel and William Vernon of [Newport], Rhode Island. Includes names of purchasers. Followed by account record for the Brig Othello to Francis Mairez and David Cooper [of Jamaica] for provisions taken on board between July 18, 1775 and August 22, 1775.
- Account record for sales of slaves aboard the Ship Ascension at Mozambique by Samuel Chace on behalf of Messrs. Vernon Gardner & Co. [William Vernon and Caleb Gardner]. Includes purchases of blankets, medical expenses, and "landing" fees, as well as a sale of 33 slaves to Don Thomas Antonio Romero in Mozambique.