Study of Two Men (recto); Study of the Head of a Bearded Man (verso) by Baccio Bandinelli https://www.rawpixel.com/image/14247940/image-cartoon-face-personFree Image from public domain licenseEsther Before Ahasuerus (recto); Slight Sketch of an Ornamental Vase (verso) by Frans Crabbe van Espleghem https://www.rawpixel.com/image/14247959/image-background-face-personFree Image from public domain license