Check Wayne County Historical Society's library and see if they have a copy of "Kentucky Gunmakers 1775-1900" Vols. I & II, and the new 3rd volume "Epilogue." If so, there are entries for the early Joel Atkinson I (TN), 2nd gen. Peter Atkinson (TN & KY), 3rd gen. Joel Atkinson, and 4th gen. Wyatt Atkinson in the "Biographies" sections. If they do not have the set of books, it might be worth talking them into purchasing the full set, since it also lists all of the known gunsmiths working in Wayne County in the muzzle loading era, along with all the known gunsmiths working in KY's other counties.
Also good reading is the booklet "Wyatt Atkinson Riflesmith" by the Milwaukee Public Museum in 1964, which details Wyatt's life and shows many pictures of Wyatt, his shop, and a detailed discussion and images of his rifling bench and how it worked.
Shelby Gallien