Statistics for occurrence #1 of “Portsmouth” in chapter 2 of Admiral David D. Porter, The Naval History of the Civil War.:

... Germantown, which was all ready for sea and only waiting a crew, or the Plymouth, in the same condition, would, with a few men on board, have saved the Navy Yard against attack, overawed Norfolk and Portsmouth , and prevented the channel from being obstructed by the Confederates. Even when the yard was abandoned and the buildings set fire to, the work was done in a panic in which the coolest persons see...
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.