If you've searched town & church records (incl. land sales & purchases) & you know your Porters came from Hadley, then they're descended from John Porter of Windsor, CT. There's an old book by Henry Porter Andrews. The Descendants of John Porter of Windsor, CT. Saratoga, Bull, 1893.... rife with errors but it's a start. When I first started researching, I tho't my family was from Windsor but soon found I was barking up the wrong Porter tree. There's probably more recent stuff than the Andrews book.