4. 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 JA, Carpenter also carried a letter from Digges to Benjamin Franklin giving the conditions under which Americans would be exchanged for those on the
Polly (
London Chronicle, 21β23 Dec. 1779; William Bell Clark, βIn Defense of Thomas Digges,β
PMHB
, 77 [Oct. 1953]:407, 408;
Digges, Letters
, p. 164β169).