The slave ship Martha completed the voyage after transporting enslaved Africans to Saint Vincent and the Grenadines.

Vessel: Martha; flag: Great Britain; rig: Ship; estimated standardized tonnage: 250. People recorded in connection with the voyage: Captain: Colley, Jas Eckly; Investor: Colley, Jas Eckly; Captain: Ward, Robert; Investor: Ward, Robert; Captain: Fisher, Ralph; Investor: Fisher, Ralph; Investor: Kewley; Investor: Kewley, Patrick; Captain: Taylor, Thomas; Investor: Taylor, Thomas. The voyage began at Liverpool on 29 May 1799. Principal recorded place where captives were acquired: New Calabar (Bight of Biafra and Gulf of Guinea islands). Principal recorded disembarkation place: St Vincent, port unspecified. Recorded outcome: Voyage completed as intended.