Ok, my Grandmother Muriel Eyster was the daughter of Ethel L. Rideout and Loy Eyster.
Ethel L. Rideout (born in MA) was the daughter of a Duncan T. Rideout born in March 1843 in Canada and married a Martha P. Emery (also born in Canada).
My grandfather had written in a diary that Martha P. Emery was the "second wife" of Duncan T. Rideout.
All the records online about Duncan T. Rideout show that he married first a Glorigiana MCNILLY.Duncan T. Rideout, at least the one that would be my 2nd great grandfather is buried in Cambridge Cemetery in Cambridge, MA.
I am thinking the Duncan T. that is referenced online under Ancestry.com's one world tree is the same one.Can anyone back me up on this?