The slave ship Prosper left the African coast carrying enslaved Africans toward Haiti. About 280 people had been taken aboard.

Vessel: Prosper; flag: France; estimated standardized tonnage: 120. People recorded in connection with the voyage: Investor: Ozenne; Captain: Guyot, Michel; Investor: Charet. The voyage began at Nantes on 9 July 1777. Principal recorded place where captives were acquired: Calabar (Bight of Biafra and Gulf of Guinea islands). Principal recorded disembarkation place: Cap Français. Recorded duration of the captives' Atlantic crossing: 78 days. Estimated mortality during the crossing: 7.0%. Recorded outcome: Voyage completed as intended.