Mongol invasion of Hungary in the thirteenth century (1893). Cahun contributed many literary articles to the Revue Bleue, Le Journal des Débats, etc., and several critical, geographical, and ethnographical papers to the Bulletin de la Société d'Ethnographie, Bulletin de la Société Académique Indo-Chinoise Bulletin de la Société Japonaise, Bulletin de la Société Americaine, Bulletin de l'Athénée Oriental, etc. In 1878 Cahun set out on a fresh series of journeys accompanied by his wife. The two intrepid travelers visited central Syria, the mountains of Ansairi (1878), the Faroe Islands and Iceland (1879), central Syria and Mesopotamia (1880). In 1879 the Tour du Monde published an account of his travels through Syria and the mountains of Ansairi. He also issued a volume treating the same subject, entitled Excursions sur les Bords de l'Euphrate (Paris, 1884). His scholarly study of local customs, Scènes de la Vie Juive en Alsace, with preface by Zadoc Kahn, chief rabbi of Paris, appeared about the same time (ib. 1885). In 1884 he published Le Congo, la Véridique Description du Royaume Africain, Traduite pour la Première Fois en Français sur l'Edition Latine Faite par les Frères de Bry en 1598, d'Après les Voyages Portugais et Notamment Celui d'Edouard Lopez en 1578 (Brussels, 1884). In 1890 Cahun established a course of lectures at the Sorbonne, where he taught the history and the geography of Asia. An abstract of one section of this course was incorporated in the Histoire Générale of Lavisse and Rambaud. Cahun's Introduction Générale à l'Histoire de l'Asie (1896), based on material gathered during his travels, is a complete and exact history of that continent. He also undertook the restoration of some ancient casts that are of great geographical interest. Some years before his death Cahun ceased writing for the Parisian periodicals, but to the end he contributed to Le Phare de la Loire. He left an unfinished history of the Arabs, and a historical novel dealing with the same topic. He was a member of several learned societies. Family Cahun came from a distinguished family, who traced back its ancestry to the times of Louis IX of France,. His nephew, the son of Mathilde Cahun, Marcel Schwob (1867–1905), was a prolific French writer. French photographer and writer Claude Cahun (born Lucy Schwob, 1894–1954) was his great-niece. Influences on Turkish nationalism Cahun's novel La Bannière bleue (1877) acted as a major source of inspiration for Turkish nationalist