Statistics for occurrence #1 of “Cambridgeport” in chapter 22, page 431 of Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register:

...ellion, and that the national government could only be preserved by force of arms. Among those who foresaw the peril and did not shrink from it was James P. Richardson, Esq., an attorney at law in Cambridgeport . In anticipation of the impending struggle, he issued the following notice:— The undersigned proposes to organize a company of volunteers, to tender their services to our common country...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Cambridgeport (Massachusetts, United States) 506 144 20 0 0 user votes
Cambridgeport (Vermont, 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.