The sale of vessels recorded at the Ludington, MI office of the U.S. Customs Service for 1864-1949 are presented here. Bills of sale, conveyance records and mortgages include the names of vessels and sale participants and the terms of agreement. In these the researcher can find information on vessel histories and the economic aspects of vessel purchases. The financial and legal files included in the records partially document the regulatory duties of the U.S. Customs Service.