Magic Slim, a revered and towering figure in the field of traditional Chicago blues, died today in a Philadelphia hospital at the age of 75. Born Morris Holt in Torrance, Mississippi in 1937, the guitarist performer, bandleader, and recording artist went on to enjoy a career that launched him to national and international recognition and acclaim.Slim was one of the foremost practitioners of the raw, gut-bucket, back alley blues associated with the postwar Chicago blues sound.