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

Vessel: Constant Mary; flag: Great Britain. People recorded in connection with the voyage: Investor: Bellerby, Francis; Investor: Fowler, Thomas; Investor: Glover, Richard; Captain: Lester, Daniel. The voyage began at Plymouth on 25 May 1654. Principal recorded place where captives were acquired: Calabar (Bight of Biafra and Gulf of Guinea islands). Principal recorded disembarkation place: Barbados, place unspecified. Recorded outcome: Arrived in Africa, subsequent fate unknown.