Traité complet de l'anatomie, de la physiologie, et de la pathologie du système nerveux cérébro-spinal ... 1re partie.… https://www.rawpixel.com/image/13981813/image-cartoon-person-artFree Image from public domain licenseDifferent types of seashells illustration from Zoology of New York (1842–1844) by James Ellsworth De Kay. Original… https://www.rawpixel.com/image/329468/free-illustration-image-shell-seaFree Image from public domain license