Sketch of a cat (1813) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Wishing you a Merry Christmas (1910) from The Miriam And Ira D. Wallach Division Of Art, Prints and Photographs: Picture… Free Image from public domain license 
Merry Christmas (1911) from The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Picture Collection.… Free Image from public domain license 
Illustration of domestic cat and kittens drinking milk from a saucer by Gottfried Mind (1768-1814). Original from Library of… Free Image from public domain license 
An antique lithograph of the human musculature system from the encyclopedia, Meyers Konversations Lexikon (1894). Digitally… Free Image from public domain license 
