Statistics for occurrence #1 of “Merrimac River” in chapter 3, section c.3.26, page 395 of The writings of John Greenleaf Whittier, Volume 6.:

...n as late as the close of the seventeenth century, was a frontier settlement, occupying an advanced position in the great wilderness, which, unbroken by the clearing of a white man, extended from the Merrimac River to the French villages on the St. Francois. A tract of twelve miles on the river and three or four northwardly was occupied by scattered settlers, while in the centre of the town a compact village ...
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