The slave ship Unicorn arrived with enslaved Africans in Martinique. About 279 people had been taken aboard and approximately 256 arrived.

Vessel: Unicorn; flag: Great Britain; rig: Ship; estimated standardized tonnage: 163. People recorded in connection with the voyage: Captain: Jones, Richard; Investor: Jones, Richard; Investor: Earle, Thomas; Captain: Earle, William; Investor: Earle, William; Captain: Riddle, Robert; Investor: Dennistown, Robert; Investor: Dennistown, Richard. The voyage began at Liverpool on 4 April 1799. Principal recorded place where captives were acquired: Bassa (Windward Coast). Principal recorded disembarkation place: Martinique, place unspecified. Recorded outcome: Voyage completed as intended.