Statistics for occurrence #1 of “Harper's Ferry” in chapter 1.7 of John Esten Cooke, Wearing of the Gray: Being Personal Portraits, Scenes, and Adventures of War.:

...ings, under Early, and these resolutely held their ground in face of an overpowering force. Thenceforward Early continued to add to his reputation as a hard fighter-at Bristoe, the second Manassas, Harper's Ferry , Sharpsburg, Fredericksburg, Gettysburg, Spotsylvania, Monocacy, and throughout the Valley campaign. During the invasion of Pennsylvania he led General Lee's advance, which reached the Susquehanna...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Harper's Ferry (West Virginia, United States) 10,974 24 304 0 0 user votes

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