Note 4 — Front matter

International Congresses, at which Esperanto was the only language used, have been held at Boulogne-sur-Mer (1905), Geneva (1906), Cambridge (1907), Dresden (1908), Barcelona (1909), Washington (1910), Antwerp (1911), Cracow (1912), Berne (1913), Paris (1914), San Francisco (1915), The Hague (1920), Prague (1921), Helsingfors (1922), and Nurnberg (1923). A Conference of educationists was held in 1922 at the Secretariat of the League of Nations in Geneva, at which twenty-eight countries and sixteen governments were represented; and in 1923 a Commercial Conference was held at Venice, to which over 200 commercial and touring associations from twenty-three countries sent delegates. At both of these conferences, Esperanto was the only language used.