The slave ship Diana left the African coast carrying enslaved Africans toward Jamaica. About 135 people had been taken aboard.

Vessel: Diana; flag: Great Britain; rig: Ship; estimated standardized tonnage: 106. People recorded in connection with the voyage: Investor: Shaw, John; Investor: Orme, Samuel; Captain: Skinner, Jonathan; Captain: Smith, William. The voyage began at Liverpool on 20 February 1791. Principal recorded place where captives were acquired: Bight of Biafra and Gulf of Guinea Islands, port unspecified. Principal recorded disembarkation place: Jamaica, place unspecified. Estimated mortality during the crossing: 11.0%. Recorded outcome: Voyage completed as intended.