The B&M and the Maine Central had common management until 1952, and shared equipment and locomotives across several of their interchange points. I'm not trying for complete coverage here, but as I encounter useful material, I will put it on line.
Other Maine Central resources:
Image scanned by George Ford and displayed here with his permission.
Page 1.
Page 2.
James B. VanBokkelen
(jbvbRemove_This@ttlc.net) .