Thanks to Ghosts of DC for posting this map, and others, on their blog, http://ghostsofdc.org/2013/02/26/love-these-rural-maps-of-washington-in-1879/ . I have snipped the Bloomingdale area and pasted below for your enjoyment. The whole map is worth a look, as well.
You can see the location of the homes of the Beales and the Moores. The Moore mansion served as the first home for St. Martin's Catholic Church, but I have yet to find anything about what happened to the Beale home. (The estates are to the west of Lincoln Road:, North Capitol dead ended into Boundary Road/Florida Avenue.)