Battle of Omdurman, Sudan: troops are massing and engaging in battle next to the River Nile.. Chromolithograph by A.… https://www.rawpixel.com/image/13968301/image-horse-people-artFree Image from public domain licenseThe Congress of Berlin: Disraeli as a tooth-drawer, assisted by Queen Victoria, operates on Sultan Abdul Hamid II of the… https://www.rawpixel.com/image/13968281/image-dog-cartoon-personFree Image from public domain licenseWilliam Marriott, member of Parliament for Brighton, as Hercules fighting a two-headed hydra with the faces of W.E.… https://www.rawpixel.com/image/13955522/image-cartoon-face-personFree Image from public domain licenseBattle of Omdurman, Sudan: troops are massing and engaging in battle next to the River Nile. Chromolithograph by A.… https://www.rawpixel.com/image/13960735/image-horse-cow-personFree Image from public domain licenseRobert Wilhelm Eberhard Bunsen. Stipple engraving by C. H. Jeens, 1881. https://www.rawpixel.com/image/13978801/robert-wilhelm-eberhard-bunsen-stipple-engraving-jeens-1881Free Image from public domain licenseMetemma, Ethiopia: soldiers treating a trooper with severe sunstroke. Watercolour by W.S. Paget, 1898, after W.T. Maud. https://www.rawpixel.com/image/14021366/image-horse-plant-personFree Image from public domain license