Haunting the recording studios, jam sessions, concert halls, and nightclubs of New York City, William "PoPsie" Randolph chronicled the postwar transformation of American music from swing and jazz, to rhythm & blues and rock n' roll. The 100 000 negatives left behind after his death in 1978 span the giddy, glitzy heyday of swing in the 1940s, the hot and cool jazz spawned in the clubs of 52nd Street, the rumbling emergence of black R&B and doo-wop,...