Report on the Business and Surveys of the Contemplated New York and Hartford Railroad via Danbury, New York and Hartford Railroad, Hartford: Press of Case, Tiffany and Burnham, 1845. Pages 59-60. (eingeschränkte Vorschau in der Google-Buchsuche)
Beard, Dan, „Mark Twain as a Neighbor,“ Review of Reviews and World's Work: An International Magazine, January-June 1910, Volume 41, page 705. (eingeschränkte Vorschau in der Google-Buchsuche)