Different types of beetles illustrated by Charles Dessalines D' Orbigny (1806-1876). Digitally enhanced from our own 1892… https://www.rawpixel.com/image/323725/free-illustration-image-beetle-insects-vintage-insectFree Image from public domain licenseCentres of the slave trade in East Africa patrolled by the Royal Navy. Wood engraving, 1875. https://www.rawpixel.com/image/14016319/image-palm-tree-person-artFree Image from public domain licenseMonoemugi, Somalia : people of Gingyra crossing the river Shabelle by carrying their belongings in the inflated skin of a… https://www.rawpixel.com/image/14014375/image-cartoon-cow-personFree Image from public domain license