Brief of Henry I. Kowalsky, of the New York bar : attorney and counsellor to Leopold II., King of the Belgians and Sovereign of the Independent State of the Congo, in matters touching his rights and possessions abroad, in reply to [the] memorial presented to the President of the United States of America concerning affairs in the Congo state by the Congo Reform Association, supported by the British and Foreign Anti-slavery Society and the Aborigines' Protection Society.