Background
Dwinnell was born in Charlestown, New Hampshire on September 14, 1834.
Dwinnell was born in Charlestown, New Hampshire on September 14, 1834.
Dwinnell was educated in the local public schools, after his education he worked for a year in the printing operations of the National Eagle in Claremont, New Hampshire after which Dwinnell moved to Worcester, Massachusetts where he worked in the grocery trade and in a hardware store.
In 1862 Dwinnell enlisted in the 51st Regiment Massachusetts Volunteer Infantry. Dwinell served as a First Lieutenant and Quartermaster of the 51st Regiment. In February 1864, after his enlistment in the 51st Regiment expired Dwinnell enlisted as a First Lieutenant and Quartermaster of the 2nd Regiment Massachusetts Volunteer Heavy Artillery, serving with Augustus B. R. Sprague.
Dwinnell saw service with the 2nd Regiment in Virginia and North Carolina.
Having reached the rank of Brevet Major. Dwinnell was mustered out on September 23, 1865.
After the American Civil War, Dwinnell return to Worcester, Massachusetts|Worcester where he became the assistant Post Master under General Josiah Pickett. In 1875 Dwinnell was appointed, by his former commanding officer Sheriff Augustus B. R. Sprague, as a Deputy Sheriff, and the Jailer and Master of the House of Correction at Fitchburg, Massachusetts.