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

Vessel: Marquês de Cascais; flag: Portugal / Brazil; rig: Brig. People recorded in connection with the voyage: Investor: Bastos, José Antônio da Silva; Captain: Cascais, José Joaquim Pinto; Investor: Cascais, José Joaquim Pinto. The voyage began at Lisbon on 31 January 1818. Principal recorded place where captives were acquired: Luanda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded outcome: Left home port, no further record.