The slave ship Mercury completed the voyage after transporting enslaved Africans to Grenada.

Vessel: Mercury; flag: Great Britain; estimated standardized tonnage: 218.3. People recorded in connection with the voyage: Captain: Froad, John; Captain: Madge. The voyage began at Bristol on 22 June 1771. Principal recorded place where captives were acquired: New Calabar (Bight of Biafra and Gulf of Guinea islands). Principal recorded disembarkation place: Grenada, place unspecified. Recorded outcome: Voyage completed as intended.