Statistics for occurrence #1 of “Massachusetts” in chapter 9 of George Bancroft, History of the Colonization of the United States, Vol. 1, 17th edition.:

...e latter a member of the church of Boston, first brought upon the colonies the guilt of participating in the traffic in African slaves. They sailed for Guinea to trade for negroes; but throughout Massachusetts the cry of justice was raised against them as malefactors and murderers; Richard Saltonstall, a worthy assistant, felt himself moved by his duty as a magistrate, to denounce the act of stealing negro...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Massachusetts (Massachusetts, United States) 30,598 236 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.