 Notable tracks include a ska tribute to Don Drummond, the haunting 'Colourful Faces' and the admonitory 'Domestic Violence'.In the last year of his life Grennan released his final record, "Clean Slate", as well as performing on and sharing arrangement duties with dub-poet Anthony Pierre on his debut, Obeah Accompong.In early 2000, Grennan appeared on "Back to the Island", a reggae compilation of local tracks produced by Peter Simon, of Martha's Vineyard.