Base trade in human beings carried on in the most barbarous fashion, those who wield power, those who sway empires, those who desire that the rights of nature and humanity be respected, and those who desire the progress of religion, to unite everywhere towards the abolition of this most shameful and most criminal traffic.
New Africa; an essay on government civilization in new countries, and on the foundation, organization and administration of the Congo Free State, THE ANTI-SLAVERY MOVEMENT, Page 136. Leo XIII. re-echoed the cry of alarm raised by Leopold II of Belgium. in 1876.