Tom - I think you are correct in that Baxter (senior), son of Russell and b: 1799, d: 1850s had a son named Baxter - I can't remember if he is recorded as a gunsmith - I think he might be one of the "probable" Bean gunsmiths listed in Jerry's book. Then there was a James Baxter Bean who was a famous dental surgeoun during the Civil War, if I recall correctly. They were a large prolific family - and they tended to incorporate intermarried family surnames into the naming of their children, i.e. Russell, Baxter, etc. So it gets really confusing very quickly when you start trying to figure who was who amongst the Baxter Beans, James Beans, or James Baxter Beans, or....(you get the idea)
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You do see a lot of very similar hardware turning up among different makers. The whole idea of some of the hardware being made up, perhaps at some of the bloomery/forge sites, and sold by iron mongers and used by a number of different local makers, would not surprise me. Just my opinion but I don't think it is just coincidence that the southern Appalachians had lots of small local iron furnaces and what seem to be the locations and timeframe for the greatest production of iron mounted guns coincides with the boom in the local iron furnaces. These really began to pop up in great numbers throughout the region, through southwestern Virginia, Tennessee, the western Carolinas, Georgia, and Kentucky in the 1790s, with peak production in the mid-1800s. However, I also realize this raises the question of why this same popularity of iron mounts did not take off in Pennsylania, or other places they were making iron much earlier....
Anyway, back to the gun - I've seen this particular toeplate before on other mountain rifles. And it looks to be riveted (or was riveted at one time), at its tail end, through to the buttplate, if I am seeing correctly. The placement of the lower buttplate screw in the middle of the plate is unusual - but it looks like maybe it was lower originally and that hole was filled and the screw was moved up - perhaps when the toe was damaged and the rivet lost (?)
Triggers are sort of unusual - almost "Hawken" looking to me - spaced much more close together than most Tennessee triggers.
Guy