The under-construction portal to the Dorchester Extension, photographed from the Dorchester Avenue bridge in October 1926. An Old Colony Division commuter train is in the background.
Boston Public Works Department
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/cityofbostonarchives/15744561378/">Looking toward section one from Dorchester Avenue bridge</a> via <a rel="nofollow" class="external text" href="https://www.flickr.com/people/48039697@N05">City of Boston Archives</a>