Statistics for occurrence #1 of “Duff” in chapter 57 of Admiral David D. Porter, The Naval History of the Civil War.:

.... end of the Confederate Navy. the President visits Richmond. at the residence of Jefferson Davis. an ovation worthy of an emperor. tactics of assassins. justice Campbell visits the President. Duff Green receives a merited rebuke. President Lincoln returns to Washington. scattering of the vessels of the Navy. the war ended. a new national anniversary. The naval operations on the Souther...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† Duff 118 2 34 0 0 user votes
Richard Duff 34 0 0 0 0 user votes
Dick Duff 28 0 0 0 0 user votes
John Duff 17 0 1 0 0 user votes
James Duff 11 0 3 0 0 user votes
W. L. Duff 10 0 2 0 0 user votes
William L. Duff 10 0 2 0 0 user votes
L. B. Duff 6 0 0 0 0 user votes
Grant Duff 5 0 1 0 0 user votes
J. Duff 4 0 0 0 0 user votes
John Charles Duff 4 0 0 0 0 user votes
W. P. Duff 4 0 0 0 0 user votes
Levi B. Duff 3 0 1 0 0 user votes
M. H. Duff 3 0 1 0 0 user votes
Samuel Duff 3 0 1 0 0 user votes
A. D. Duff 2 0 0 0 0 user votes
D. H. Duff 2 0 0 0 0 user votes
G. B. Duff 2 0 0 0 0 user votes
J. H. Duff 2 0 0 0 0 user votes
J. M. Duff 2 0 0 0 0 user votes
J. T. Duff 2 0 0 0 0 user votes
J. W. Duff 2 0 0 0 0 user votes
John D. Duff 2 0 0 0 0 user votes
Michael Duff 2 0 0 0 0 user votes
O. C. Duff 2 0 0 0 0 user votes
Reese B. Duff 2 0 0 0 0 user votes
Saturday Dick Duff 2 0 0 0 0 user votes
W. Duff 2 0 0 0 0 user votes
Mountstuart Elphinstone Grant Duff 1 0 1 0 0 user votes
W. R. Duff 1 0 1 0 0 user votes
William Duff 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.