Statistics for occurrence #1 of “Harper's Ferry” in chapter 21, page 224 of Col. John C. Moore, Confederate Military History, a library of Confederate States Military History: Volume 9.2, Missouri:

...hern Virginia for the invasion of Maryland. Walker led his division to the support of Jackson at Harper's Ferry, and was directed to seize Loudoun Heights. This he did, and after the surrender of Harper's Ferry marched with the other divisions of Jackson's command to Sharpsburg. In the opening of the great battle of September 17, 1862, his division was first on the right, but was soon sent to the support ...
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Harper's Ferry (West Virginia, United States) 10,974 4 304 0 0 user votes

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