Biographical Sketch of Amos Dwinnell Leave a Comment / New Hampshire / May 14, 2011 Last Updated on August 27, 2012 by AMOS, IRA and CYRUS DWINNELL were in the early days mechanics at the Flat. Surnames:Dwinnell, Topics:Biography, Locations:Croydon New Hampshire, Sullivan County NH,Collection:Partridge, Dennis N. Croydon New Hampshire Genealogy.