A wolf is sitting opposite a sow with its young under a tree while a boar and a wolf are fighting in the background; illustration of a fable by Aesop. Etching.

Licence: Public Domain Mark

Credit: A wolf is sitting opposite a sow with its young under a tree while a boar and a wolf are fighting in the background; illustration of a fable by Aesop. Etching. Wellcome Collection. Source: Wellcome Collection.