1876 – Lake Attitash divided between Amesbury and Merrimac
On April 11, the section of Amesbury called West Amesbury became the Town of Merrimac. “Division line runs from Merrimac river to south side of Lake Attitash, thence obliquely to state line.”
From Chronological Record of the Principal Events That Have Occurred in Amesbury by Emily Binney Smith, 1901.