 He was author of the "Histoire de la colonie juive de Genève 1843–1943" (1944) and of the novel cycle "La tragédie d'Israël" ("Miriam" and "De père en fils"; 1927–1928).In the early 1910s, he boosted Panait Istrati's career by teaching him French, and helped him during his illness.In 1947, he was a delegate to the Seelisberg Conference.