The slave ship William and Mary departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Martinique.

Vessel: William and Mary; flag: Great Britain; rig: Schooner; estimated standardized tonnage: 89. People recorded in connection with the voyage: Investor: McDowal, Samuel; Investor: Twemlow, Thomas; Captain: Flinn, John. The voyage began at Liverpool on 7 April 1805. Principal recorded place where captives were acquired: Gambia (Senegambia and offshore Atlantic). Principal recorded disembarkation place: Martinique, place unspecified. Recorded outcome: Captured by the French - after embarkation of enslaved people.