Thanks to J. Shriver for the tip on this! A link to the “Real Estate Atlas of the Part of Montgomery County Adjacent to the District of Columbia” by Deets and Maddox at Johns Hopkins. (unfortunately the images are in JPEG2000 format and will require either a Mac (Safari or Preview) or a program like Photoshop to open.) I don’t have a whole lot of background on this atlas, but it is really neat. Apparently it covers the land in Montgomery county in several volumes, this one focusing on the area just North of DC and includes the entirety of the Georgetown Branch in Montgomery County, MD. Here is an overview of the plates:
The GB begins at the Junction on plate 12B and continues through 12A, 11D, 11H, 11L, 11K, 11O, 13C and 13G. Early history sources for the GB are rare so this atlas is particularly special. The Branch had only been completed about seven years prior and was very much in its infancy with the extension to Georgetown. Many of the towns along the route had not yet bloomed and as such there is not a lot to see as far as trackage. What you do see are some of the extinct transit lines that crossed the GB at various spots like Connecticut Ave., Wisconsin Ave., Bradley Blvd., and Dalecarlia. Here are a few highlights: