David Livingstone and his men stung by bees in central Africa. Lithograph. https://www.rawpixel.com/image/13962907/david-livingstone-and-his-men-stung-bees-central-africa-lithographFree Image from public domain licenseIn darkest Africa, or, The Quest, rescue, and retreat of Emin, governor of Equatoria / by Henry M. Stanley. https://www.rawpixel.com/image/14000342/image-face-person-clothingFree Image from public domain license