Statistics for occurrence #1 of “Portsmouth” in chapter 3 of Admiral David D. Porter, The Naval History of the Civil War.:

...bsp;         Savannah New York April 1 June 1 July 10   Jamestown Philadelphia April 9 May 18 June 8   Vincennes Boston April 9 June 24 July 12   Marion Portsmouth April 20 June 30 July 14   Dale Portsmouth April 20 June 30 July 17   Preble Boston April 20 June 22 July 11 Brigs--           Bainbridge Boston April 2...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Portsmouth (New Hampshire, United States) 470 0 134 0 0 user votes
Portsmouth (United Kingdom) 107 0 13 0 0 user votes
Portsmouth (Dominica) 0 0 0 0 0 user votes
Portsmouth (Iowa, United States) 0 0 0 0 0 user votes
Portsmouth (Kentucky, United States) 0 0 0 0 0 user votes
Portsmouth (Virginia, United States) 0 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.