Hi Violet, welcome to the forum.
Another Mills contact! Sanders Davis Mills was the father of Spendlove Mills who has been mentioned recently on here. Sanders married Sarah Sutcliffe after Jane died. Sarah is the sister of my gt gt grandmother!
The only reference I have in my file for the Mills and America is from the census. It would seem that they went in 1867ish and returned to England in 1872.
This is the topic where spendlove Mills gets his mention.
viewtopic.php?f=7&t=3369&p=18080&hilit=spendlove#p18080