Statistics for occurrence #1 of “Portsmouth” in chapter 1.56 of Southern Historical Society Papers, Volume 35.:

...r Circumnavigation of the globe and many Conquests on the high seas. From the pen of her Executive officer, Captain William C. Whittle. The following is taken from the Confederate Column of the Portsmouth Star, conducted by Colonel William H. Stewart, published in serial issues of March 13, April 3, 1907: We are pleased to announce that the marvelous story of the Confederate States ship Shenandoah...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Portsmouth (New Hampshire, United States) 470 1 134 1 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.