Hi! I am looking for information on a John Holland Sr. He is said to have opened the "Hartford" Colliery, once called the "Baldwin"s" in Mahonoy City, PA. I don't know if he was an investor, the owner or part of an investor group. Is there a source dealing with the history of the Collieries that might provide information about him. He may be related to a William E. Holland, bon abt. 1874 in Schuyhill Haven, PA. Any help appreciated, Donna M. Wolf