Postcard. Post office. Court St. Size: Published American Art Post Card Co. Brookline. For many years Mentomy/West Cambridge had no formal facilities provided by the U.S. Government. Drivers of passing stages acted voluntarily as letter carriers, with inconsistent results. Letters were often delivered to Thomas Russell's grocery store (shared in a post 2 weeks ago) where they were posted for public view and pick up. Other houses and businesses served a similar purpose in the intervening years (with the business owner serving as Post Master). Our current main post office location opened at 10 Court Street, Building built in April 1936. It was a project of the Works Project Administration (WPA) during the Great Depression. This project hat the goal to put the many unemployed people to work on infrastructure projects. The WPA also included the work of artists, which is shown inside the post office in the original murals that adorn the lobby.