 He is best known for publishing the "Esperanto picture dictionary" (1988) and a massive anthology co-edited with his wife, "Esperanto in the Modern World" (1982).In 1949, then living in Göttingen, West Germany, he became a delegate to the World Congress of Esperanto held in Bournemouth, England, but in 1953 he and his Esperantist wife Vilma (1926–1995) emigrated to Toronto, Canada and were thereafter pillars of the Esperanto movement.In 1956 they moved to a house they bought in the countryside near Oakville, 30 km west of Toronto.