Adding some detail, Fitchburg Division Time Table (yes, 2 words) No. 61, effective 12. (yes, decimal and not colon) 01 A.M., Sunday, Sept. 25, 1927, shows connection waits at Winchendon and Gardner for delayed Southern Division trains, the Worcester and Contoocook then being Southern Division. The waits at Gardner seemed primarily for passengers to and from the west, the Winchendon waits better serving passengers to and from the east. Later ETTs had combined all Divisions, and No. 10, effective Nov. 22, 1931, has no connection waits listed, probably a reflection of trying to use inconvenience to reduce ridership to reduce trains. That same ETT shows the Worcester and Contoocook assigned to the Fitchburg Division from Worcester to Winchendon, the rest of the route remaining in the Southern.
Somewhat on topic, the Historical Society of Cheshire County published Bradford Blodget's Marium Foster's Boston and Maine Railroad in 2011, an in-depth look at 40+ years of the Chesirfe Branch and eastern Fitchburg Division. Dunno its current availability, but it's worth chasing down.
"A gray crossover is definitely not company transportation."