The slave ship Visconde de S Lourenço arrived with enslaved Africans in Brazil. About 424 people had been taken aboard and approximately 388 arrived.

Vessel: Visconde de S Lourenço; flag: Portugal / Brazil; rig: Brig. People recorded in connection with the voyage: Investor: Almeida, Venceslau Miguel de; Captain: Rodrigues, Luís Manoel. The voyage began at Bahia, place unspecified on 12 July 1821. Principal recorded place where captives were acquired: Malembo (West Central Africa and St Helena). Principal recorded disembarkation place: Bahia, place unspecified. Recorded duration of the captives' Atlantic crossing: 32 days. Recorded outcome: Voyage completed as intended.