Good eyes, Bruce! According to a 1939 BAR timetable, they ran a number of mixed trains to outlying locations in the north woods. One of them was a 30 minute route from Millinocket (where Great Northern Paper was located) to E. Millimocket. Might be it if Millinocket was the photo location. The boxcar with windows could be either a MOW car or one of the BAR cabooses constructed from troop sleepers.
