Yes, Henry P is the son of Chauncy and Mary Ketcham. I believe Chauncy's mother is buried in Cayuga county. Her name was Sarah. Isaac may be buried in Saratoga county. Wish I could find the 1855 census for Cayuga county it would tell me where Isaac (what county) Chauncy was born in anyway. Henry P moved to Michigan and there was a little story posted about him on Genweb. I do think he was also known as Porter early on in life. The story said that his father was Isaac and his mother was Sarah.. no last name on Sarah.