US National Archives
Nara: Founding Fathers: Delegates to the Constitutional Convention
The National Archives and Records Administration (NARA) provides biographies of all 55 delegates to the Constitutional Convention.
US Army Center
U.s. Army Center of Military History: John Langdon
This article summarizes the life of John Langdon, one of the delegates from New Hampshire to the Constitutional Convention. It gives details on his personal life, military and political careers.
US National Archives
Nara: Founding Fathers: New Hampshire
Gives biographical details on the two delegates from New Hampshire to the Constitutional Convention: Nicholas Gilman and John Langdon.
University of Groningen
American History: Biographies: John Langdon 1741 1819
Langdon was born in 1741 at or near Portsmouth, NH. His father, whose family had emigrated to America before 1660, was a prosperous farmer who sired a large family. The youth's education was intermittent. He attended a local grammar...
Curated OER
John Langdon
This article summarizes the life of the delegate from New Hampshire to the Constitutional Convention. It gives details on his personal life, military and political careers.