Mark Twain's pamphlet condemning King Leopold of Belgium for his brutal rule of the Congo, published in 1905 by the American Congo Reform Association.

Analysis and publications of the Congo Reform Association formed in 1904 to protest King Leopold's rule of the Congo Free State.

Antique 3D stereoscopic photographs of the Congo Free State and the Belgian Congo.

The Congo Reform Association's use of photographic evidence of atrocities to build its case against King Leopold's rule of the Congo Free State.