Matthew McDowell b Longford, Ireland 1815 settled Pleasant Twp Potter Co PA mar Hannah Burt. John M Clark b 1838 Troupsburg NY son of John T, b 1797 in NJ and Louisa Slighter??? b 1809 in NJ. John T removed to Potter Co PA Where two more children b Maria in 1842 and Ezra T in 1844.I dont have enough info to make a connection but it seems unlikly!