If any musical justification were needed for the breakup of Simon & Garfunkel, it could be found on this striking collection, Paul Simon's post-split debut. From the opening cut, "Mother and Child Reunion" (a Top Ten hit), Simon, who had snuck several subtle musical explorations into the generally conservative S&G sound, broke free, heralding the rise of reggae with an exuberant track recorded in Jamaica for a song about death. From there, it was off to Paris for a track in South American style and a rambling story of a fisherman's son, "Duncan" (which made the singles chart). But most of the album had a low-key feel, with Simon on acoustic guitar backed by only a few trusted associates (among them