John 'Hoppy' Hopkins (1937-2015) BACKSTAGE AT A BLUES CONCERT, Muddy Waters and Otis Spann jam with Sonny Terry and Brownie McGee, c.1964, and 'Thelonius Monk's hands, silver gelatin prints, (2), printed later, image sizes 390mm x 260mm, signed recto by the photographer in ink, window mounted, 510mm x 400mm