Edwin Connor was already an actor in London when he released his lp of Jamaican folk song in 1952, having appeared in "Cry, the Beloved Country."
Two books may have information on how he collected the songs, and any changes he made to them.
Horizons- "The Life and Times of Edric Connor," 2007, Ian Randle Pub., Jamaica. "Songs from Trinidad," Edric Connor, 1958, 76pp. Arrangements by Walters.