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

Vessel: Neptune; flag: Great Britain; estimated standardized tonnage: 146.2. People recorded in connection with the voyage: Captain: Hill, Thomas; Investor: South Sea Company. The voyage began at London on 2 December 1721. Principal recorded place where captives were acquired: Cabinda (West Central Africa and St Helena). Principal recorded disembarkation place: Kingston. Recorded duration of the captives' Atlantic crossing: 86 days. Estimated mortality during the crossing: 12.5%. Recorded outcome: Voyage completed as intended.