Statistics for occurrence #1 of “Mason Street” in chapter 4 of Lucius R. Paige, History of Cambridge, Massachusetts, 1630-1877, with a genealogical register:

...se; one to Windmill-hill, now Ash Street; and one to Watertown marsh, not far westerly from the residence of Samuel Batchelder, Esq. The first and last of these three highways were long ago closed. Mason Street was early distinguished as the highway from Charlestown to Watertown. The original highway to the Fresh Pond followed the track of the present Garden Street, Wyeth Street, and Vassall Lane, excep...
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