The National Archives has digitized the wealth of demographic information contained in the 1940 Census. Future posts will show more background on Sterling at the time, but for now, here is the Census Bureau’s map of Eastern Loudoun at the time:
Click the image to enlarge it. There are four maps in total for Loudoun [1,2,3,4]. A legend is included in Map #2, but for quick reference, full squares indicate farms and half-shaded squares are non-farms.