Statistics for occurrence #1 of “Boston Harbor” in chapter 8, page 419 of William Schouler, A history of Massachusetts in the Civil War: Volume 1:

...etter of the Governor appears to have been satisfactory to Mr. Stanton, as Colonel Wilde was commissioned brigadier-general April 24, eight days after it was written. The defenceless condition of Boston Harbor had from the first attracted the serious attention of the Governor and of the community generally. The seizure of our merchant vessels upon the high seas by rebel cruisers, and the frequent reports...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Boston Harbor (Massachusetts, United States) 627 64 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.