The slave ship Mary departed from Jamaica after the slave-trading stage of the voyage.

Vessel: Mary; flag: Great Britain; rig: Ship; estimated standardized tonnage: 171. People recorded in connection with the voyage: Captain: Tarleton, John; Investor: Tarleton, John; Captain: Tarleton, Thomas; Investor: Tarleton, Thomas; Investor: Backhouse, Dan; Captain: Rigmaiden, Thomas; Investor: Rigmaiden, Thomas. The voyage began at Liverpool on 17 December 1791. Principal recorded place where captives were acquired: Bight of Biafra and Gulf of Guinea Islands, port unspecified. Principal recorded disembarkation place: Montego Bay. Estimated mortality during the crossing: 20.0%. Recorded outcome: Voyage completed as intended.