The slave ship S João do Rio departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Brazil.

Vessel: S João do Rio; flag: Portugal / Brazil; rig: Sumaca. People recorded in connection with the voyage: Captain: Sá, Matias Carneiro de; Captain: Fidalgo, João Evangelista. The voyage began at Bahia, place unspecified on 24 November 1818. Principal recorded place where captives were acquired: Luanda (West Central Africa and St Helena). Principal recorded disembarkation place: Bahia, place unspecified. Recorded outcome: Bought at least one slave in Africa - subsequent fate unknown.