Philadelphia, September 1, 1781.
Sir: Brigadier General Duportail has very earnestly solicited the exchange of Colos. Laumois and Cambray of the Corps of Engineers who were taken prisoners at Charles Town upon the principal of the utility which they would be of to the southward should we carry on any operations in that Quarter. Altho I am impressed with the truth of Genl. Duportails observation upon this matter I cannot without deviating from an Order of Congress and an established rule of Exchange give those
[Note:In the writing of William Stephens Smith. The letter was read in Congress on September 3 and referred to the Board of War. ]