The slave ship S Sebastião left the African coast carrying enslaved Africans toward Brazil. About 178 people had been taken aboard.

Vessel: S Sebastião; flag: Portugal / Brazil; rig: Galera. People recorded in connection with the voyage: Investor: Companhia Geral do Grão Pará e Maranhão; Captain: Duarte, Joaquim Ribeiro; Investor: Duarte, Joaquim Ribeiro. The voyage began at Lisbon on 15 March 1774. Principal recorded place where captives were acquired: Cacheu (Senegambia and offshore Atlantic). Principal recorded disembarkation place: Maranhão. Estimated mortality during the crossing: 1.0%. Recorded outcome: Voyage completed as intended.