Mento is pre-calypso Jamaican music, crucial in the formation of ska and reggae. Michael Garnice’s MentoMusic.com site contains a wealth of fascinating information about artists recordings, tracks etc.
I have been learning songs from the recordings of Edric Connor, Louise Bennett & The Jamaican Folk Singers.
The Jolly Boys are a big name in mento nowadays. They started out in the 1940s but are still going strong!