The slave ship S José Diligente Vulcano arrived with enslaved Africans in Brazil. About 312 people had been taken aboard and approximately 287 arrived.

Vessel: S José Diligente Vulcano; flag: Portugal / Brazil; rig: Brig. People recorded in connection with the voyage: Captain: Oliveira, José Malaquias de; Captain: Macedo, Joaquim Teixeira de; Investor: Macedo, Joaquim Teixeira de; Captain: Mafra, José da Silva. The voyage began at Rio de Janeiro on 13 August 1820. Principal recorded place where captives were acquired: Cabinda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 42 days. Estimated mortality during the crossing: 8.0%. Recorded outcome: Voyage completed as intended.