I started a Central Mass topic, and it got me to thinking of a couple of other things. For one, Was there a depot at the Beaver Brook Station, and, is the freight house that is located there a former B&M freight house or a customer owned building (I'm talkin' back in the day)?
The Waltham Lime & Cement building at Beaver Brook looks a lot like a former railroad structure, but it isn't -- it was built for transloading bags of cement and the like from boxcars to trucks. The B&M freight house in Waltham was downtown, at the Elm Street crossing across from the tower, and it not only still exists but is splendidly painted in traditional B&M yellow and maroon.
As for whether Beaver Brook had a station building in ancient times, I don't know. If it did, it was gone by the 1960s.