Statistics for occurrence #1 of “northeastern Piedmont” in chapter 11 of Maj. Jed. Hotchkiss, Confederate Military History, a library of Confederate States Military History: Volume 3, Virginia:

... McClellan was gathering at Washington, but especially to cover the important approaches from the northwest to Baltimore and the Federal city, particularly those from the lower Shenandoah valley and northeastern Piedmont , Virginia. On October 19th McCall's Federal division advanced to Dranesville, on the road to Leesburg and about 15 miles from that place, in order to cover the reconnaissance made in all directio...
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