Lord Invader was a prominent calypsonian with a very distinctive, gravelly voice. He was born in San Fernando, Trinidad. He became active in calypso in the mid-1930s, and was considered a country bumpkin by his contemporaries, because of his humble beginning. 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." With a new name, in 1937 he went to the capital city of Port of Spain and began his career in earnest. He competed in many calypso competitions and recorded for RCA Bluebird. Lured by Decca Records, he travelled to New York City in 1941 with other calypsonians such as Roaring Lion and Atilla the Hun to make records and promote calypso music. He wrote many calypsos; his most famous lyrics, "Rum and Coca-Cola", were plagiarised by Morey Amsterdam and became a hit for the Andrews Sisters. Invader travelled to New York and sued, eventually winning compensation, although the final settlement allowed Amsterdam to retain his copyright.