After literally growing up at Studio One, Delroy Wilson decided to have a go elsewhere in 1967 and linked up with producer Bunny Lee. However he cut only a handful of songs, "This Old Heart of Mine" included, before scampering back to Coxsone Dodd.
The original was a Top 15 U.S. hit for the Isley Brothers the year before, which is why Lee was keen to have the teen star record it. The producer set the song to a lovely, unintrusive arrangement, heavy on the cymbals, of course, but with the emotive piano riff to the fore.
However, it's the vocals that are the producer's focus, and Wilson gives a creamy, impassioned performance, almost turning the number into a torch song. Still, Wilson seems just a bit uncomfortable in this new setting, which may explain why the single didn't hit as big as Lee expected. In a few years, that would all change, and Wilson would cut some of his best loved songs for the producer, but this single, released in 1968, was where it all started.