The slave ship Sinceridade arrived with enslaved Africans in Brazil. About 206 people had been taken aboard and approximately 197 arrived.

Vessel: Sinceridade; flag: Portugal / Brazil; rig: Sumaca. People recorded in connection with the voyage: Investor: Magalhães, Manoel José de; Captain: Santos, Fernando Bruno dos; Captain: Neves, José da Silva; Investor: Vieira, Francisco Jose Luis. The voyage began at Bahia, place unspecified on 8 September 1818. Principal recorded place where captives were acquired: Luanda (West Central Africa and St Helena). Principal recorded disembarkation place: Bahia, place unspecified. Recorded duration of the captives' Atlantic crossing: 37 days. Estimated mortality during the crossing: 4.0%. Recorded outcome: Voyage completed as intended.