Thank you very much for taking the trouble. If you are interested, there is another rifle by John Selvidge shown in a May 1996 Muzzle Blasts (magazine of NMLRA) article by George Shumway, reproduced in vol. II "Longrifle Articles Pulbished in Muzzle Blasts 1965-2001". The rifle in the article is maple with a capbox and round cheekpiece, but the hardware (triggerguard and ramrod pipes for example) is very similar, and the signature is identical to yours, it appears to me. It is esp. interesting to me to have two rifles stocked and trimmed quite differently but signed by the same maker. According to that article, that rifle was the only Selvidge known, so you may have doubled the world's inventory, but I don't know if others have been found since it was published. That article also references two other books that have some biographical information on Selvidge (who worked near Cleveland, TN), and pictures of him and his tools. Your rifle looks to be in good, original condition, and left-handed to boot. I'm not a collector, but many here are, and they should be able to tell you more.