Raimey, tell High I said hello, and speak loudly!The other gunsmith from that era was Ed Mason, whose shop is next to Highsmith in the Dawdle sporting good building. Ed may have some data also. His son Bob now runs the business.
Ole Miss does not have a good picture of "Bo Whoop". Blood Lines, shows pattern tests, but just describes the Becker, 32 in 10 lb magnum.
Nash did a lot of hunting at Quail Hill in Ms. It was owned by John Bailey and the source for George Bird Evans book.The lodge is still standing and John's daughters might have many of Nashes letters and pictures.Contact me directly and I can get you in touch with them if you are interested.
Best,
Craig Havener