I should think that Henry Morton Stanley, the great explorer of the dark continent and famous for his expedition to find Dr. Livingstone, would also have used a Stanley knife!
That Africans do not have a monopoly on cruelty is evinced by this horrific exerpt from Wikipedia:
"In 1886, Stanley led the Emin Pasha Relief Expedition to "rescue" Emin Pasha, the governor of Equatoria in the southern Sudan. King Leopold II demanded that Stanley take the longer route, via the Congo river, hoping to acquire more territory and perhaps even Equatoria. After immense hardships and great loss of life, Stanley met Emin in 1888, discovered the Ruwenzori Range and Lake Edward, and emerged from the interior with Emin and his surviving followers at the end of 1890. (Turnbull, 1983) But this expedition tarnished Stanley's name because of the conduct of the other Europeans: British gentlemen and army officers. An army major was shot by a carrier, after behaving with extreme cruelty. James Jameson, heir to an Irish whiskey manufacturer, bought an eleven-year old girl and offered her to cannibals to document and sketch how she was cooked and eaten. Stanley only found out when Jameson had died of fever. Previous expeditions had given Stanley satisfaction, but this one had only brought disaster."
Here is Stanley alighting at the Admiralty Pier in Dover after this expedition:
