This is a cool old map from 1896. Check it out and click on it for a larger version.
1896 map of Reservoir Hill
Source: Johns Hopkins Sheridan Library
Here’s the same area on a Google Map today.
[googlemaps https://maps.google.com/maps?ie=UTF8&ll=39.308535,-76.630669&spn=0.024074,0.045104&t=m&z=15&output=embed]