Statistics for occurrence #1 of “Fort Donelson” in chapter 31 of Colonel William Preston Johnston, The Life of General Albert Sidney Johnston : His Service in the Armies of the United States, the Republic of Texas, and the Confederate States.:

...him, December 28th, before the arrival of the Alabama negroes, and while as yet he had only slaves borrowed in the neighborhood, giving an encouraging account of the progress of the fortifications at Fort Donelson . The arrival of the Alabama negroes gave him the means of doing at least as much at Fort Henry. At Clarksville some 300 negroes were employed, but the works there seem not to have been pushed vig...
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Entity Corpus Doc Corpus Doc  
Fort Donelson (Tennessee, United States) 3,926 182 172 0 0 user votes

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