In your letter, inclosing the Morocco signals, you desire them to be delivered to American masters of vessels.1 The council have interpreted this expression to mean masters of American vessels; that is, of vessels belonging to American citizens. They seem justified in this construction, by the Morocco treaty itself. One instance only of granting these signals has occurred; and the captain was not proved to be an American citizen; but we were satisfied only, that the vessel was American property. If we have mistaken this matter, be so good as to inform me. I am Sir with great respect Yr. mo. ob. sert.