. This was Capt. Benjamin Carpenter of the cartel ship Polly
. The cartel had arrived at Bristol on 19 Dec. 1779, 24 days out of Boston, carrying
prisoners taken on their passage to Jamaica. Besides this letter to
, Carpenter also carried a letter from Digges to Benjamin Franklin giving the conditions
under which Americans would be exchanged for those on the Polly
, 21–23 Dec. 1779; William Bell Clark, “In Defense of Thomas Digges,”
, 77 [Oct. 1953]:407, 408; Digges, Letters
, p. 164–169).