The slave ship Defiance departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Jamaica.

Vessel: Defiance; flag: Great Britain; rig: Ship; estimated standardized tonnage: 267. People recorded in connection with the voyage: Investor: Neilson, William; Investor: Heathcoat, William; Captain: Johnson, Moses; Investor: Johnson, Moses. The voyage began at Liverpool on 11 May 1799. Principal recorded place where captives were acquired: Bonny (Bight of Biafra and Gulf of Guinea islands). Principal recorded disembarkation place: Kingston. Recorded outcome: Voyage completed as intended.