The slave ship William left the African coast carrying enslaved Africans toward Dominica. About 328 people had been taken aboard.

Vessel: William; flag: Great Britain; rig: Ship; estimated standardized tonnage: 218.3. People recorded in connection with the voyage: Investor: Case, George; Investor: Gregson, John; Investor: Gregson, James; Captain: Apsinall, James; Investor: Apsinall, James; Investor: Gregson William (Jr); Captain: Begg, William; Investor: Begg, William; Investor: Gregson, William; Investor: Wilson, Edward; Captain: Aspinall, Edward; Captain: Trafford, Henry; Investor: Trafford, Henry. The voyage began at Liverpool on 8 May 1786. Principal recorded place where captives were acquired: Calabar (Bight of Biafra and Gulf of Guinea islands). Principal recorded disembarkation place: Dominica, place unspecified. Estimated mortality during the crossing: 9.0%. Recorded outcome: Shipwrecked or destroyed, after disembarkation.