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

Vessel: Neptune; flag: Great Britain; rig: Snauw; estimated standardized tonnage: 254.3. People recorded in connection with the voyage: Investor: Brooks, Joseph; Captain: Thompson, Thomas; Investor: Thompson, Thomas; Captain: Brooks, Jonathan; Investor: Brooks, Jonathan; Investor: Brooks, John. The voyage began at Liverpool on 18 July 1749. 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: Voyage completed as intended.