It was Grant's tailor who gave him his moniker by commenting, "I tell you, Rupert, you should call yourself Lord Invader so when you go up to the city you be invadin' the capital."
Invader travelled to New York and sued, eventually winning compensation, although the final settlement allowed Amsterdam to retain his copyright.
In the early 1940s, radio stations in the USA refused to play his own version on the grounds of its using the trademarked name, Coca-Cola, and its references to prostitution and alcohol.
He is often credited with writing "Zombie Jamboree", although the song was actually written by Lord Intruder (Winston O'Conner), who released it on the B-side of his 1953 single "Disaster with Police".
The following discs give a good idea of his work: In 1961, Invader released an atypical LP, West Indian Folk Songs for Children (Caedmon Records).