Élisabeth Bégon was born Marie Isabelle Élisabeth Rocbert de la Morandière, in Montréal, Quebec, Canada, then a colony of France known as Nouvelle-France. She is known to history for the letters she wrote between 1748 and 1753 to her son-in-law, Michel de Villebois de la Rouvillière, which describe the daily life of a French-Canadian lady of that time. The correspondence was discovered in the 1930s in the archives of the French Ministry of the Navy. A collection of her writings, including letters, nine of her notebooks, and 39 leaflets was published in 1935 under the title Lettres au cher fils. It is one of the only known works by a French-Canadian laywoman during this period of time.