I too am looking for the parents of Fanny Proctor. (Frances Powers) married to Charles M. Powers.
My lineage goes through Andrew's brother, Nelson Powers who remained in Maine.
Ancestry trees seem to give Frances Power "Fanny" parents of Ebenezer Proctor and Bethiah Mayberry, but this couple never shows a "Frances" in the one book that mentions them "Windham in the Past".
If Fanny Proctor is indeed the daughter of Ebenezer Proctor, it's a direct line to John Proctor of the Salem Witch trials, but I can find no proof (though ancestry family trees say it's so!)
Let me know if you've found any more out on Fanny's parentage.