The slave ship S José Diligente Vulcano arrived with enslaved Africans in Brazil. About 390 people had been taken aboard and approximately 362 arrived.

Vessel: S José Diligente Vulcano; flag: Portugal / Brazil; rig: Bergantim. People recorded in connection with the voyage: Investor: Guimarães, João Alves de Souza; Captain: Costa, Silvestre Manoel Pereira da. The voyage began at Rio de Janeiro on 1 September 1821. Principal recorded place where captives were acquired: Luanda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 39 days. Estimated mortality during the crossing: 7.0%. Recorded outcome: Voyage completed as intended.