The only information I have on Sarah is that she died in 1856 and was buried at Little Flock (Sullivan County IN cemetery records Vol 1). I did give you some wrong information of one of their children. They had 3 sons, Albert? Squire, and John Alexander Jr. not John Newton McDonnall. John Newton is a son of John Alexander Jr. Sorry about that!. John Newton and his family moved to Vigo Co.Praireton Twp. IN. after 1870 I believe. Squire and his wife Mary Chestnut must have died during the late 1850's as in the 1860 cenus their children are living with John Alexander McDonnall Sr. There is no record of their burial in any of the Sullivan Co. Cemetery records.
I believe this is the right connection. I wasn't sure about Sarah's maiden name but I did have McLaughlin in my notes. Now I will change it to McCrocklin. Thanks for the information.
Will let you know if I find anymore information.