The slave ship Allison departed from Guyana after the slave-trading stage of the voyage.

Vessel: Allison; flag: Great Britain; rig: Ship; estimated standardized tonnage: 249. People recorded in connection with the voyage: Captain: King, Thomas; Investor: King, Thomas; Captain: Calvert; Investor: Calvert; Investor: Camden, William; Captain: Thomson, James; Captain: Roberts, M; Captain: Marman, John. The voyage began at London on 3 October 1803. Principal recorded place where captives were acquired: Accra (Gold Coast). Principal recorded disembarkation place: Demerara.