Boston Elevated... @ Harvard school of Govt.

Does anybody know the history of the Boston Elevated Railway block that sits in the courtyard of the Harvard School of Government? Where was it locate? How long as it been at it's current home? that type of stuff. Sorry if this question is a repeat.

The old yard was removed when the red line was extended north of harvard, in the 1970's some time I think. A hotel and park was built on the old yard/barn. Streetcars and trolley buses were also stored at Bennett yard. It was located up against Memorial drive and extended over to the current Bennett alley where the T buses pull through by Mt. Auburn Street.