I believe that your Ira Glidden (1796-1861) was the brother of my 4th great grandfather Simeon Glidden (1798-1865), both the sons of Simeon Glidden (1769-1831) and Sarah Carpenter (1775-1831). Unfortunately, at this time I don't have anything to add to your search for Ira and Elliott, I just thought I would make the connection!