Statistics for occurrence #1 of “Halleck” in chapter 20 of John G. Nicolay, A Short Life of Abraham Lincoln, condensed from Nicolay and Hayes' Abraham Lincoln: A History:

...ut back to New Orleans, lest his ships of deep draft should be detained in the river by the rapidly falling water. The capture of Vicksburg was postponed for a whole year, and the early transfer of Halleck to Washington changed the current of Western campaigns.
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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Henry W. Halleck 1,400 175 40 1 0 user votes
H. W. Halleck 5,082 0 120 0 0 user votes
Halleck 1,974 0 538 0 0 user votes
Henry Wager Halleck 533 0 15 0 0 user votes
Fitz-Greene Halleck 100 0 0 0 0 user votes
W. H. Halleck 94 0 4 0 0 user votes
Gen Halleck 34 0 0 0 0 user votes
Butler Halleck 27 0 1 0 0 user votes
M. G. Halleck 20 0 0 0 0 user votes
Joseph Halleck 9 0 3 0 0 user votes
Gens Halleck 8 0 0 0 0 user votes
A. J. Halleck 7 0 1 0 0 user votes
Benjamin Buel Halleck 6 0 0 0 0 user votes
Fitz-Green Halleck 4 0 0 0 0 user votes
Genenal Halleck 4 0 0 0 0 user votes
Isaac Halleck 4 0 0 0 0 user votes
W. Halleck 4 0 0 0 0 user votes
Charles Halleck 2 0 0 0 0 user votes
Ebenezer Halleck 2 0 0 0 0 user votes
George Halleck 2 0 0 0 0 user votes
Major-Gen Halleck 2 0 0 0 0 user votes
H. Wager Halleck 1 0 1 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.