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

Vessel: Mercúrio; flag: Portugal / Brazil; rig: Ship. People recorded in connection with the voyage: Investor: Viana, José Antônio Rodrigues; Captain: Lopes, João Crisóstomo Rodrigues; Investor: Costa, Manoel Joaquim da. The voyage began at Bahia, place unspecified on 19 December 1817. Principal recorded place where captives were acquired: Cabinda (West Central Africa and St Helena). Principal recorded disembarkation place: Bahia, place unspecified. Recorded duration of the captives' Atlantic crossing: 19 days. Recorded outcome: Voyage completed as intended.