1S. and J.-H. Delap to the American Commissioners, 18 July 1778 (Franklin Papers)
ALS or LS : American Philosophical Society We take the liberty of forwarding you Inclosed a Letter from Captn. William Hill Sargeant. He informs us it is Requesting you to give him a letter of Marque Commission and that he has offered you our House as Guarantee that no improper use will be made of same. If this formality requisite and that you think us sufficient Security for any improprieties...