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

Vessel: Mariana Dáfne; flag: Portugal / Brazil; rig: Bergantim. People recorded in connection with the voyage: Investor: Macedo, Diogo Teixeira de; Captain: Oliveira, Sérgio Ferreira de. The voyage began at Rio de Janeiro on 25 September 1821. Principal recorded place where captives were acquired: Luanda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 48 days. Estimated mortality during the crossing: 22.0%. Recorded outcome: Voyage completed as intended.