The Online Books Page

Léopold II, King of the Belgians, 1835-1909

See also what's at Wikipedia, your library, or elsewhere.

• King Leopold's Soliloquy: A Defense of His Congo Rule (second edition; Boston; P. R. Warren Co., 1905), by Mark Twain (Gutenberg text and illustrated HTML)
• Leopold the Second, King of the Belgians (London: Hutchinson and Co., 1910), by A. S. Rappoport (multiple formats at archive.org)
• 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 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 (1905), by Henry I. Kowalsky
  • multiple formats at archive.org
  • page images at HathiTrust
• King Leopold II: His Rule in Belgium and the Congo (London et al.: Cassell and Co., 1905), by John de Courcy MacDonnell
  • multiple formats at Google; US access only
  • multiple formats at archive.org

Items below (if any) are from related and broader terms.