Griffins, female grotesque, mask and figures (recto); two turtle-like creatures and a scene with figures (verso), ?… https://www.rawpixel.com/image/9330005/image-art-vintage-maskFree Image from public domain licenseStudies for birds and grotesque masks (recto); candelabra grotesques, ewers and vases (verso), ? attributed to Andrés… https://www.rawpixel.com/image/9330003/image-art-vintage-masksFree Image from public domain license