The slave ship Dois Irmãos departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Brazil.

Vessel: Dois Irmãos; flag: Portugal / Brazil; rig: Brig. People recorded in connection with the voyage: Investor: Alves, Antônio Ferreira; Captain: Maria, Boaventura José. The voyage began at Rio de Janeiro on 29 December 1828. Principal recorded place where captives were acquired: Congo River (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 30 days. Estimated mortality during the crossing: 7.0%. Recorded outcome: Voyage completed as intended.