The slave ship Mercury arrived with enslaved Africans in Guyana. About 405 people had been taken aboard and approximately 371 arrived.

Vessel: Mercury; flag: Great Britain; rig: Ship; estimated standardized tonnage: 241. People recorded in connection with the voyage: Captain: Hammond, Benj; Investor: Hammond, Benj; Investor: Buddicom Robert; Captain: Begg, William; Investor: Begg, William; Captain: Mill, John; Investor: Mill, John; Investor: Rackham, John; Investor: Sellar, Robert; Investor: Shand, Charles. The voyage began at Liverpool on 24 December 1798. Principal recorded place where captives were acquired: Rio Pongo (Sierra Leone). Principal recorded disembarkation place: Demerara. Recorded outcome: Voyage completed as intended.