The slave ship Grão Penedo arrived with enslaved Africans in Brazil. About 229 people had been taken aboard and approximately 225 arrived.

Vessel: Grão Penedo; flag: Portugal / Brazil; rig: Bergantim. People recorded in connection with the voyage: Investor: Rocha, José Francisco Ferreira da; Captain: Oliveira, Sérgio Ferreira de. The voyage began at Rio de Janeiro on 17 July 1818. Principal recorded place where captives were acquired: Cabinda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 32 days. Estimated mortality during the crossing: 2.0%. Recorded outcome: Voyage completed as intended.