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: Bergantim; estimated standardized tonnage: 200. People recorded in connection with the voyage: Captain: Santos, Gil Tomás dos; Investor: Santos, Gil Tomás dos; Investor: Castro, Antônio José de. The voyage began at Lisbon on 17 March 1828. Principal recorded place where captives were acquired: Lourenço Marques (East Africa and Indian Ocean islands). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 43 days. Estimated mortality during the crossing: 8.0%.