Jourdain began her career ghost-writing as
Francis Lenygon for the firm of Lenygon & Morant. dealers in furnishings with a royal appointment, who were also the fabricators of carefully crafted reproductions, especially of Kentian furnishings, some of which have been displayed in public collections for decades. The finely honed writing that distinguishes Jourdain's work must be partly credited to careful pre-editing by her lifelong friend and domestic partner, the novelist
Ivy Compton-Burnett. The couple lived together from 1918 until Jourdain's death in 1951. Members of their circle speculated on whether they were lovers: Compton-Burnett referred to herself and Jourdain as "neutrals". Jourdain's papers are archived at the
Victoria and Albert Museum, London, but some of her unpublished translations of poems by
Jose Maria de Heredia,
Pontus de Tyard and
Gérard de Nerval are among Compton-Burnett's papers at
King's College, Cambridge. Jourdain's
Regency Furniture (1931) covered new ground in extending the "classic" period of English furniture design forward to 1830. With Ralph Edwards, Keeper of Furniture and Woodwork at the Victoria and Albert Museum, she co-wrote
Georgian Cabinet-Makers (1944, 1951), a series of biographies of the major furniture-makers of England from the
Restoration of Charles II to 1800. Their studies were based on archival work, which had not been a strong feature of previous connoisseurship. As revised by Edwards, their biographies remained standard works until they were superseded by the work of Peter Ward-Jackson,
Christopher Gilbert,
Helena Hayward, and members of the
Furniture History Society. ==Major works==