Statistics for occurrence #1 of “Portsmouth” in chapter 26 of Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register:

...haniel, b. 5 Oct. 1731, H. C. 1749, loan officer, d. 25 June 1798; Mercy, b. 18 Jan. 1732-3, d. 4 July 1733; Mercy, b. 24 Aug. 1734, d. 12 Sept. 1734; Henry, bap. 29 May 1737, H. C. 1755, merchant in Portsmouth , d. 5 Sept. 1768; John, bap. 1 April 1739, H. C. 1757, merchant in Salem, d. Mar. 1817; Samuel, bap. 11 May 1740, prob. d. young. Nathaniel the f. grad. H. C. 1712, and was Fellow of the Corpor...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Portsmouth (New Hampshire, United States) 470 58 134 20 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.