The slave ship Duchesse de Grammont left the African coast carrying enslaved Africans toward Haiti. About 427 people had been taken aboard.

Vessel: Duchesse de Grammont; flag: France; estimated standardized tonnage: 329.3. People recorded in connection with the voyage: Investor: Lepot; Investor: Exaudy de Kerbiguet; Captain: Mesnard, Pierre. The voyage began at Nantes on 24 September 1767. Principal recorded place where captives were acquired: West Central Africa and St Helena, port unspecified. Principal recorded disembarkation place: Cap Français. Recorded duration of the captives' Atlantic crossing: 57 days. Estimated mortality during the crossing: 2.0%. Recorded outcome: Voyage completed as intended.