Elisha had a sister named Abigail Jane Richards who was married to my ggg-grandfather Timothy Fernald. I have not been able to confirm my suspicions yet. But I suspect the parents of their mother Mary Philbrook are Elisha Philbrook and Doretha Witham. Elisha is the son of Capt William Philbrook and Didiana Lasalle. They were from the same region as Mary and were married about the time she was born.
My chief suspects for Thomas Richards parents are Joseph Richards Jr. and Sarah Young but I have no proof. Joseph Richards father is also named Joseph and his parents were James Richards and Sarah Foss.
I need to check all census info and compare children listed from other sources on the Richards I have seen on the net.