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Per SecondHandSongs, Belasco himself likely appropriated the melody from an earlier 1880s Barbadian folk song, “King Ja Ja” — meaning the very composer who successfully sued Morey Amsterdam for stealing his melody may have engaged in the same uncredited borrowing from an even earlier source. A real, layered irony.
Lord Invader (Rupert Grant) set new wartime lyrics to this melody; when Morey Amsterdam published it in the US under his own name, Belasco (for the melody) sued for infringement and won in 1948 — already documented on the Rum and Coca-Cola page.
In Baron v. Leo Feist, Judge Simon Rifkind stated there was no doubt Amsterdam brought both words and music from Trinidad, rejecting a rival composer’s claim of original authorship as fabricated.
Every source cited on this page — 3 in total