In my Bourne Auction catalog for the 1980 sale of the 141 lots of the M.S. Riley collection, there is a short bio written by H.J.Swinney and a nice photo of Risley in his workshop ..."The Risley family has retained six guns of family significance" from the auction. (Most of his collection was comprised of high quality percussion guns and accessories. ) Unfortunately there is only one image of each of the handful of bolt action rifles "made and marked by M.S. Risley" that might be of interest to you in this catalog. Swinney states that , "Mr Risley did the barrel work and chambering on most early Owen rifles."