Statistics for occurrence #1 of “Middlesex” in chapter 25, page 528 of Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register:

...red by lion. Timothy Bigelow, of Groton. Mr. Dana; m. Anna Kendrick, and had at Groton Luther, b. 13 Aug. 1763; Amelia, b. 14 Ap. 1765; Samuel, b. 26, June 1767, June of Court of Common Pleas, in Middlesex ; Thesta, b. 14 Aug. 1769; Anna,b. 16 June 1771; and others born in New Hampshire. 16. Benjamin, s. of William (9), was prob. the same who, by w. Lucy, had Jonathan,, bap. 13 Nov. 1785. 17. ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Middlesex (United Kingdom) 115 8 3 2 0 user votes
Middlesex (Belize) 2 0 0 0 0 user votes
Middlesex (Jamaica) 0 0 0 0 0 user votes
Middlesex (New Jersey, United States) 0 0 0 0 0 user votes
Middlesex (New York, United States) 0 0 0 0 0 user votes
Middlesex (North Carolina, United States) 0 0 0 0 0 user votes
Middlesex (Ohio, United States) 0 0 0 0 0 user votes
Middlesex (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.