The slave ship Quatro de Abril left the African coast carrying enslaved Africans toward Brazil. About 901 people had been taken aboard.

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. 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: 68 days. Estimated mortality during the crossing: 24.0%. Recorded outcome: Voyage completed as intended.