The slave ship Mersey departed from Trinidad and Tobago after the slave-trading stage of the voyage.

Vessel: Mersey; flag: Great Britain; rig: Ship; estimated standardized tonnage: 202. People recorded in connection with the voyage: Investor: Hayes, Thomas; Investor: Newton, Samuel; Investor: Monkhouse, Graham; Captain: Mortimer, John. The voyage began at Liverpool on 13 January 1803. Principal recorded place where captives were acquired: Africa, port unspecified (Other Africa). Principal recorded disembarkation place: Trinidad, port unspecified. Recorded outcome: Voyage completed as intended.