 Their last opera collaboration was for Alfred Bruneau's 1923 opera "Le jardin du paradis".De Flers also wrote the librettos for Reynaldo Hahn's "Ciboulette" (1923) with playwright Francis de Croisset, and Joseph Szulc's "Le petit choc" (1923).De Flers and de Caillavet also often worked together on stage plays, producing such comedies as "Le Sire de Vergy" (1903), "Les Sentiers de la vertu" (1903), "Pâris ou le bon juge" (1906), "Miquette et sa mère" (1906), "Primerose" (1911), and "L’Habit vert" (1913) among other works.