Diary of John Adams, volume 4
Commissioners to De Segray, Beaugeard fils & Co. Messrs. Desegray, Beaujard and Co. Merchants L'orient Passy July 9. 1778 Please to deliver to Mr. Schweighauser, Merchant at Nantes, or to his order, Fifteen hundred and twenty Bags of India Salt Petre belonging to the United States, and marked as follows—(here follow the Marks which are not necessary to transcribe1) in all 1520 Bags weighing 216475 nt. We are Gentlemen yours &c.
Signed B. Franklin, Arthur Lee, John Adams