DC Police Districts

DcPoliceDistricts.jpgIf you can make this map out, it is the police districts for the city, circa 1900-1950-ish. I’m betting 1930. This is once again another sad tale of where I copy stuff and completely fail to note where I got it from exactly.
I know this much, I got it from the Census. The image is sitting on my computer in PDF form and the dates and all sorts of wonderful information would be revealed if I could remember what folder on what drive it sits.