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.
Images scanned by George Ford and displayed here with his permission.
Maintained by James B. VanBokkelen.