Vermont Historical Society: Home of the Vermont History Center and Museum
MyVermont.gov: Vermonters are offered free access to all Vermont records and Vermont historical newspapers stored at Newspapers.com and Ancestry.com when using the links provided through their MyVermont.gov account. Both are excellent resources for Vermont historical and genealogical research.
Library of Congress: Excellent archive, including some documents related to Underhill and its residents.
University of Vermont Maps of Underhill: A collection of 19th and 20th century maps of Underhill documenting changes in the town over time.
Underhill Historical Society 