The slave ship Visconde de S Lourenço departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Brazil.

Vessel: Visconde de S Lourenço; flag: Portugal / Brazil; rig: Bergantim. People recorded in connection with the voyage: Captain: Porto, Antônio Alves da Silva; Investor: Porto, Antônio Alves da Silva; Captain: Cunha, Eusébio José da. The voyage began at Rio de Janeiro on 9 October 1823. Principal recorded place where captives were acquired: Quilimane (East Africa and Indian Ocean islands). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 50 days. Estimated mortality during the crossing: 12.0%. Recorded outcome: Voyage completed as intended.