found: Hunt, C. Portraits of winning horses, 1849:t.p. (Rock Brothers & Payne. No. 11 Walbrook, London)
found: Brown, P.A.H. London publishers and printers, 1982:p. 165 (Rock Bros. & Payne; 11 Walbrook, fl. 1844-1883)
found: British Book Trade Index, WWW page, June 3, 2004(Rock Brothers & Payne; 11 Walbrook, London, fl. 1846; Rock & Co., publishers in London 1851-1854, possibly same as Rock Bros. & Payne)
found: OCLC, June 2, 2004(hdg.: Rock Brothers & Payne; usage: Rock & Co.; Rock Bros. & Payne; Rock Brothers & Payne; Rock Bros. and Payne)
