Sea letter or sea brief
SEA LETTER OR SEA BRIEF, maritime law. A document which should be found on board of every neutral ship; it specifies the nature and quantity of the cargo, the place from whence it comes, and its destination. Chit. Law of Nat. 197; 1 John. 192.
A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.