The slave ship NS das Mercês e Sr dos Milagres arrived with enslaved Africans in Brazil. About 466 people had been taken aboard and approximately 447 arrived.

Vessel: NS das Mercês e Sr dos Milagres; flag: Portugal / Brazil; rig: Curveta. People recorded in connection with the voyage: Investor: Silva, Manoel Marques da; Captain: Bastos, João Batista de Araújo; Investor: Silva, Antônio Marques da. The voyage began at Bahia, place unspecified on 14 January 1799. Principal recorded place where captives were acquired: Whydah, Ouidah (Bight of Benin). Principal recorded disembarkation place: Bahia, place unspecified. Recorded duration of the captives' Atlantic crossing: 41 days. Estimated mortality during the crossing: 4.0%. Recorded outcome: Voyage completed as intended.