The slave ship Mary Ann departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Grenada.

Vessel: Mary Ann; flag: Great Britain; rig: Ship; estimated standardized tonnage: 174. People recorded in connection with the voyage: Captain: Tarleton, John; Investor: Tarleton, John; Captain: Tarleton, Thomas; Investor: Tarleton, Thomas; Investor: Tarleton, Clayton; Investor: Backhouse, Dan; Captain: Webster, Charles; Captain: Griffith, William; Investor: Griffith, William. The voyage began at Liverpool on 14 October 1786. Principal recorded place where captives were acquired: Iles de Los (Sierra Leone). Principal recorded disembarkation place: Grenada, place unspecified. Estimated mortality during the crossing: 3.0%. Recorded outcome: Voyage completed as intended.