Statistics for occurrence #1 of “Jack” in part 6.13, chapter 6.14 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: The Opening Battles. Volume 1.:

...st with us. He was about eighteen years of age, red-headed, freckled-faced, good-natured and rough, with a wonderful aptitude for crying or laughing from sympathy. Another comrade, whom I will call Jack , was honored with a call from his mother, a little woman, hardly reaching up to his shoulder, with a sweet, motherly, care-worn face. At the last moment, though she had tried hard to preserve her c...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Jack 825 20 17 2 0 user votes
James Jack 33 0 1 0 0 user votes
Thomas M. Jack 32 0 4 0 0 user votes
T. M. Jack 26 0 4 0 0 user votes
Charles E. Jack 19 0 3 0 0 user votes
E. A. Jack 12 0 0 0 0 user votes
Liverpool Jack 10 0 0 0 0 user votes
Jeremiah Jack 6 0 0 0 0 user votes
Stonewall Jack 6 0 0 0 0 user votes
— Jack 6 0 0 0 0 user votes
William Jack 5 0 1 0 0 user votes
Alonzo G. Jack 4 0 0 0 0 user votes
Charles Jack 3 0 1 0 0 user votes
E. R. Jack 2 0 0 0 0 user votes
Gofney Jack 2 0 0 0 0 user votes
Harlow Jack 2 0 0 0 0 user votes
John Jack 2 0 0 0 0 user votes
John T. Jack 2 0 2 0 0 user votes
L. Jack 2 0 0 0 0 user votes
Patrick C. Jack 2 0 0 0 0 user votes
H. Jack 1 0 1 0 0 user votes
John E. Jack 1 0 1 0 0 user votes
Thomas Jack 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.