I'm a descendant of Sarah Barnes and John Scoville, too, from their son Benjamin's daughter Keziah, who married James Stewart. Then it goes to their g-granddaughter as the last Stewart name in the line I belong to. Lots of other Stewarts still running around, though!!
I must say that looking at the material on the Barnes family on the FHC site only confuses the issue thoroughly, as the dates for marriages for Thomas to his various wives, and the names given for the Mary ladies, and the birthdates for the children (to say nothing of burial dates before death dates!!) don't work out at all. There are many submitters listed, but several of them seem to have just taken the same wrong information and used it, having Mary Andrus and Mary Andrews listed like one person and again like separate ones with different parents, or no parents at all listed...and there's a marriage to an Ann, and one to Deborah Orvis as well!!
I'd be happy to see what you have and get some of it squared away at last!!