Statistics for occurrence #1 of “Fort Henry” in chapter 2, page 19 of William Boynton, Sherman's Historical Raid:

... Grant and Commodore Foote, Halleck replied: headquarters Department of the Missouri, St. Louis, January 29, 1862. Brigadier-General Grant, Cairo. Make your preparations to take and hold Fort Henry . I will send you written instructions by mail. H. W. Halleck, Major-General
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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Fort Henry (Tennessee, United States) 2,037 48 79 0 0 user votes
Fort Henry (Missouri, United States) 4 0 0 0 0 user votes

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