Statistics for occurrence #1 of “Boston harbor” in article pos=44 of The Daily Dispatch: November 25, 1861., [Electronic resource]:

...who was captured at Hatteras by the enemy, and was recently exchanged, has been sojourning in this city for a day or two past. He is just from Fort Warren, one of the Lincoln bastilles, situated in Boston harbor .
...
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.