Statistics for occurrence #1 of “Harper's Ferry” in chapter 6 of Maj. Jed. Hotchkiss, Confederate Military History, a library of Confederate States Military History: Volume 3, Virginia:

...ester, and by thus opposing Patterson prevent his anticipated junction with McClellan. While waiting for a guide, he received a letter from Cooper, dated June 13th, giving him permission to abandon Harper's Ferry and retire toward Winchester, and, if not sustained by the people of the valley so that he could turn on the enemy before reaching Winchester, to continue to retire to the Manassas Gap road; that it ...
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Harper's Ferry (West Virginia, United States) 10,974 361 304 1 0 user votes

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