Both rifles in this thread are very interesting, and it's a shame we don't know who stocked them. He certainly deserves some recognition. It seems apparent that he had a good eye and a fair amount of experience as well, so there are probably other similar rifles out there, Hopefully someone will be able to shed some light on this mystery.
I agree that the broken stock is worth repairing and saving. I've found Titebond II wood glue to be the best for making repairs in clean walnut where the surfaces can be closely clamped together. The bond is very strong, and the glue joint is less visible than any other adhesive I've tried. Still, as noted, the grain layout seems less than ideal, and it would be advisable to also have some reinforcing pins epoxied in place from within the inletting. That is complicated by the tang screw, so it might be better to bore one larger hole and use a single large hickory dowel instead.