Statistics for occurrence #1 of “John Duncan” in chapter 20 of Admiral David D. Porter, The Naval History of the Civil War.:

...s Isaac De Graff, C. M. Burchard, A. K. Fulton, H. H. Pilkington and W. H. Gamble; Acting-Master's Mates, H. H. Judson, C. H. Loundsberry, T. Mason and J. M. Smalley; Boatswain, James Walker; Gunner, John Duncan ; Carpenter, J. H. Conley; Sailmaker, J. A. Holbrook. Commander, J. M. Wainwright; Lieutenant, Edward Lea; Acting-Masters, J. A. Hannum, C. H. Hamilton and W. F. Monroe; Assistant Surgeon, T....
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
John Duncan 28 2 0 0 0 user votes
John Duncan Quackenbos 4 0 0 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.