In going through my "inbox" messages, I reread your post re Milnes/Pilkington. I don't recall if I answered you via email, if not, I apologize.
I would be interested in any Milnes data which you might have. Perhaps by "backtracking" from Sallie Milnes or C.H. Milnes we might be able to connect. The surname Milnes was certainly not common in Iowa.