Spear points were found in Jefferson, at the north end of Damariscotta Lake, back in the early 1970s. The discoverers, Dara and John Carberg, donated them to the Jefferson Historical Society, where they sat in a drawer until recently, except for identification by Deborah Wilson, archaeologist, who said they came from 4000 to 7000 years ago. On May 23, Dr. Arthur Spiess, Senior Archaeologist with the Maine Historic Preservation Commission, gave a slide talk for the historical society, in the Ladies’ Aid Hall at Bunker Hill, Jefferson, about some of the early history of the area, as well as those particular spear points.
It's actually a pretty good article if you make it past the "Spear People" idea.