The slave ship Apolo completed the voyage after transporting enslaved Africans to Brazil.

Vessel: Apolo; flag: Portugal / Brazil; rig: Brig. People recorded in connection with the voyage: Captain: Barros, Antônio Daniel Batista; Investor: Pinto, Antônio José; Investor: Barreto, João Perreira. The voyage began at Lisbon on 2 March 1821. Principal recorded place where captives were acquired: Cacheu (Senegambia and offshore Atlantic). Principal recorded disembarkation place: Maranhão. Estimated mortality during the crossing: 3.0%. Recorded outcome: Voyage completed as intended.