Yep, it's a map of Athol, but the railroad photo is of Athol Junction in Springfield.
I know the area this map depicts. As you look at it, the directions are reversed: the top is south, the bottom north, the left east, the right west. The tracks of the old B&A branch to Springfield are on the top, along with the roundhouse and freight house. The bridge to the left is an underpass, not an overpass, unlike the photo. It's the Sanders Street underpass, which the B&M still crosses. The long, long dormant B&A track is, believe it or not, still lying there, with trees growing up through the middle of it, right up to the westerly abutment that used to carry it over the street.
It's been confirmed that the photo depicts Signal Tower No. 38, Athol Junction on the Boston & Albany --- this from a definitive list of the B&A's Interlocking Towers prepared on July 9, 1970 by George E. Ford, Jr., and the Boston rail historian Norton D. Clark, who co-authored Boston's Commuter Rail, volumes 1 and 2, in 1986. The info. was forwarded to me earlier today by my railfan friend Chris Coyle of Athol.
