No, it seems to me that you have it all together, better than I did when I posted my hasty note!Ithamar Conkey Cowles [apparently named for the hymn writer Ithamar Conkey, who wrote the tune for "In the Cross of Christ I Glory"] is indeed the son of Franklin Cowles.All your dates are correct. Franklin had 5 children, of whom 3 married.Ithamar had 2 daughters, of whom one had at least one son--Franklin Cone.I believe there is family in the Harpersfield OH area named Cone, but I'm not sure they're related. There were also 2 daughters of Franklin:Elenora (usually called Ella) and Emma.Ella, who was my gr-grandmother, had 2 sons, Franklin and Leon.I'm not sure whether Leon had any children; he and my grandfather were not close.I know that we did not inherit any firearms through Ella, just some documents. Emma had eight children; maybe this is where you need to search, but it won't be easy!To get started, try this website, sponsored by the Harper Family Association (Mary Harper, father of Adna, was a daughter of Capt. Alexander Harper).