We won't transcribe all of the book Biographical Sketches of Representative Citizens of the Commonwealth of Massachusetts because information published after this book was published in 1901 surpasses some of the presumed birth dates in this document. But we will transcribe the reference to the William Shackford referenced above:
William 3, Shackford, born in 1702 [sic, now estimated at 1706, jsp], who died in 1772, married Cotober 5, 1727, Susanna Downing. He was commissioned Captain in 1748 for invasion of Canada, and in 1750 was Captain at Fort Dummer.
American Series of Popular Biographies Massachusetts Edition This Volume Contains Biographical Sketches of Representative Citizens of the Commonwealth of Massachusetts
(Boston: Graves & Steinbarger, 1901), page 911; digital images, Google Books (books.google.com : accessed 5 May 2014An Index of Ancestors and Roll Members of the Society of Colonial Wars (New York: The General Assembly, 1922), page 424; digital images, Google Books (http://books.google.com : accessed 26 April 2014
Brattleboro Historical Society, http://brattleborohistoricalsociety.org/stories/brattleboros-beginnings/
Vermont State Parks, Fort Dummer State Park, http://www.vtstateparks.com/htm/fortdummer.htm
Copyright 2014 Joanne Shackford Parkes