The slave ship John and Martha completed the voyage after transporting enslaved Africans to Montserrat.

Vessel: John and Martha; flag: Great Britain; estimated standardized tonnage: 254.3. People recorded in connection with the voyage: Captain: Hamilton, Alexander; Captain: Jamesin. The voyage began at Bristol on 17 November 1747. Principal recorded place where captives were acquired: Calabar (Bight of Biafra and Gulf of Guinea islands). Principal recorded disembarkation place: Montserrat, port unspecified. Recorded outcome: Voyage completed as intended.