I have two clues. I have Joshua Wilde will in which he states his daughter Mary is married to Chauncey Ketcham. Then another clue is a statement made in a memoir from Henry P Ketcham that his grandfather was Isaac. I cannot find a will for Isaac or just where he was born or where he died. I think it may have been in saratoga county or in Schenectady county. Any idea where Isaac may have been born?