The slave ship Adelphi departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Puerto Rico.

Vessel: Adelphi; flag: Great Britain; rig: Ship; estimated standardized tonnage: 276. People recorded in connection with the voyage: Investor: Fletcher, Caleb; Investor: Fletcher, Joseph; Investor: Fletcher, Jacob; Captain: Robinson, Daniel. The voyage began at Liverpool on 22 May 1804. Principal recorded place where captives were acquired: Africa, port unspecified (Other Africa). Principal recorded disembarkation place: Puerto Rico, port unspecified. Recorded outcome: Captured unspecified after embarkation of enslaved people.