Sketches of Horses' (or Dromedaries') Legs (recto); Columns (verso) by Follower of Leonardo da Vinci https://www.rawpixel.com/image/8969653/image-paper-horse-artFree Image from public domain licenseHeads of Horses and Unicorns by Follower of Leonardo da Vinci https://www.rawpixel.com/image/8969965/heads-horses-and-unicorns-follower-leonardo-vinciFree Image from public domain licenseLeonardo da Vinci. Line engraving by D. Cunego, 1782, after G. Collani. https://www.rawpixel.com/image/13976651/leonardo-vinci-line-engraving-cunego-1782-after-collaniFree Image from public domain licenseRuitergevecht (1666 - 1707) by Gerard Edelinck and Leonardo da Vinci https://www.rawpixel.com/image/13784654/ruitergevecht-1666-1707-gerard-edelinck-and-leonardo-vinciFree Image from public domain license