Four Studies of Heads Drawn over a Copy of Saint John the Evangelist by Correggio (recto); Three Studies of Men (verso) by… https://www.rawpixel.com/image/14246723/image-paper-cartoon-faceFree Image from public domain licenseMan adjusts a large-format camera with folding bellows by Arnold Eagle https://www.rawpixel.com/image/14327581/man-adjusts-large-format-camera-with-folding-bellows-arnold-eagleFree Image from public domain license