Polly Thompson married Milo FESSENDEN. Sarah married Thomas GRINNELL.Both girls married in Oakland County. Milo is in the 1860 Cass Co. census, living next to Polly's brothers and father.He is however married to his second wife and they have his son with Polly Thompson living there.(His second wife was Polly E. Bell).The Fessenden family moved to Kansas.I haven't yet found when or where Polly Thompson Fessenden died.
After Sarah married Thomas Grinnell, I can't find any mention of either of them.
If anyone knows anything or could offer a suggestion, I'd appreciate it.