The slave ship S Marcos arrived with enslaved Africans in Brazil. About 421 people had been taken aboard and approximately 381 arrived.

Vessel: S Marcos; flag: Portugal / Brazil; rig: Bergantim; estimated standardized tonnage: 159. People recorded in connection with the voyage: Captain: Santos, Antônio Félix dos; Captain: Andrade, Inocêncio Matoso de; Investor: Andrade, Inocêncio Matoso de; Captain: Reis, José Joaquim dos. The voyage began at Pernambuco, place unspecified on 16 November 1819. Principal recorded place where captives were acquired: Luanda (West Central Africa and St Helena). Principal recorded disembarkation place: Pernambuco, place unspecified. Recorded outcome: Voyage completed as intended.