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

Vessel: Maria Tomásia; flag: Portugal / Brazil; rig: Galera. People recorded in connection with the voyage: Captain: Melo, Francisco Xavier Álvares de; Investor: Velho, Amaro. The voyage began at Rio de Janeiro on 26 September 1817. Principal recorded place where captives were acquired: Cabinda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 32 days. Estimated mortality during the crossing: 8.0%. Recorded outcome: Voyage completed as intended.