Mitchell

Looking for more info on the great grandparents of Almon Mitchell born 02 Mar 1857 in bowdoin maine and died on 02 May 1925 on rams island where he was a light keeper...His parents were Hiram mitchell & elizabeth ridley...Looking for more info on Jonathan Mitchell born about Abt. 1780 in lisbon,maine ? and married Ruth alden born about 1784..Hit a brick wall and cant seem to go past these 2 indiviuals