Have you checked the “Great Northern Paper Company Records, 1889-1992” in the Special Collections, Raymond H. Fogler Library, at the University of Maine. You must – Wonderful photographic archives of the area! LINK: https://goo.gl/Q7WyVi. That is, of course, in addition to the other most excellent collection of regional photographic archives located at the Patten Lumbermen’s Museum.
