The slave ship William departed from Saint Vincent and the Grenadines after the slave-trading stage of the voyage.

Vessel: William; flag: Great Britain; rig: Brigantine; estimated standardized tonnage: 110.3. People recorded in connection with the voyage: Captain: Graham, William; Captain: Rigmaiden, Thomas; Investor: Rigmaiden, Thomas; Investor: James, W. The voyage began at Liverpool on 22 October 1771. Principal recorded place where captives were acquired: Windward Coast, place unspecified. Principal recorded disembarkation place: St Vincent, port unspecified. Recorded outcome: Voyage completed as intended.