Statistics for occurrence #1 of “Boston harbor” in chapter 7 of Admiral David D. Porter, The Naval History of the Civil War.:

...we had placed her in the wrong in the war of 1812, and retaliated on her so severely that she was glad to invoke peace. In the mean time Messrs. Mason and Slidell were confined in Fort Warren (in Boston harbor ), as close prisoners. The excitement in England was intense, and all those who entertained ill feelings against the United States and her institutions were not slow in manifesting them. The B...

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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Boston Harbor (Massachusetts, United States) 627 2 1 0 0 user votes
Boston Harbor (New Hampshire, United States) 0 0 0 0 0 user votes
Boston Harbor (Washington, United States) 0 0 0 0 0 user votes
Boston Harbor (Washington, 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.