Był członkiem honorowym Polskiego Towarzystwa Historycznego i Polskiego Towarzystwa Naukowego na Obczyźnie, komandorem orderu Polski Odrodzonej.
Wybrane publikacje Poland and the Poles, London: Methuen 1919 http://archive.org/details/polandpoles00boswuoft. The survival of Polish civilisation, London: The Hist. Association 1941. Past of Poland. A lecture delivered in London at a conference of school teachers on March 20th, 1943. The Eastern boundaries of Poland, Birkenhead: Polish Publications Committee 1943. Eastern Poland : its historical, etnographic, economic, political and cultural background, Chicago: Polish American Congress 1943. Poland in the light of the past. Lecture delivered at the conference on Poland for teachers, held at the University of Liverpool on September 25-26, 1943, Birkenhead: Polish Publications Committee 1943. Poland through the ages. Eight maps re-drawn from "The Eastern Boundaries of Poland", New York: Polish Infromation Centre 1943. Las fronteras del este de Polonia, La Habana: Compãnia Edit. de Libros y Folletos 1944.