Jeanine Louise Nelly Delpech entered the world on the 1st of August 1905 at the Château du Prieuré in Évecquemont. Records from the Archives des Yvelines confirm her birth registration number ten on the 2nd of August 1905.
Delpech published under multiple names including Jean de Lutry and Robert Beauchamp throughout her career. Under Jean de Lutry she wrote romance novels starting in the late 1940s while her detective fiction appeared under Robert Beauchamp during the 1960s.
Her translation efforts brought English authors into French households through careful linguistic work. James Hadley Chase's Eh bien ma jolie found new life in her hands alongside Mary Stewart's Les Lévriers du seraglio and Ernest Hemingway's biographical account titled Les Vertes Collines d'Afrique.
She died on the 3rd of July 1992 in the 7th arrondissement of Paris after decades of public service. Her death marked the end of a long period of writing across multiple genres and pseudonyms.
The Académie Française awarded her the Prix Alice-Louis-Barthou in 1958 for historical scholarship regarding her work titled L’Âme de la Fronde : Madame de Longueville published the previous year. This honor recognized her ability to blend rigorous research with narrative flair while examining the life of Madame de Longueville during a complex period of French history.