From the 1930s until the Maine Central ended passenger service it had a power pooling arrangement with the Boston and Maine between Bangor, Me and Boston. While there are plenty of diesel photos, steam photos are not all that common, but the Maine Central's dinky Hudsons did get to Boston. Freight and passenger steam power was pooled by B & M and Canadian Pacific between White River Jct and Newport, VT. The Rutland and B & M pooled steam passenger power between Troy, NY and Rutland, VT.One B & M round-trip passenger train utilized a Central Vermont steamer between Springfield, MA
and White River Jct. This was because all of the passenger service was managed by the B & M but two tickets were lifted for the 123 mile run. 109 miles for B & M and 14 miles for CV. Rather than do day by day calculations for an operation that had large seasonal swings in passenger traffic (lots of colleges on line, heavy summer traffic) B & M and CV worked out a deal that CV would provide an engine, some cars and a crew part of the year for all the CV passengers carried those 14 miles (Windsor-White River Jct) on B & M trains. Except for the Bangor-Boston pooling a single crew worked the entire run. Rutland crews operated into Troy, B & M into Rutland, CP crews into White River, B & M crews into Newport, etc. Bangor-Boston crews changed at Portland.