The slave ship Quatro de Abril departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Brazil.

Vessel: Quatro de Abril; flag: Portugal / Brazil; rig: Ship. People recorded in connection with the voyage: Captain: Lontra, Rafael Inácio da Fonseca; Investor: Almeida, João Rodrigues Pereira de. The voyage began at Rio de Janeiro on 13 August 1827. Principal recorded place where captives were acquired: Mozambique (East Africa and Indian Ocean islands). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 73 days. Estimated mortality during the crossing: 9.0%. Recorded outcome: Voyage completed as intended.