Leonardo da Vinci was an artist, inventor, engineer and scientist, but he also found time to write little fables for himself. In the margins of his notes he would pen short tales of how pride and envy would bring down a moth, tree or even a stone.
Ever since Aesop’s Fables was written in ancient Greece, people have been sharing these short stories that illustrate a moral truth. They were popular in medieval times as well, with many writers explaining how misfortune stuck men, animals, insects and even plants and rocks.
These fables are found in Leonardo’s notebooks from the years 1487 to 1494, when he was working in the service of Ludovico Sforza, Duke of Milan. They were written in the margins, perhaps as little notes to amuse or remind himself while he worked on bigger projects. Leonardo seems to have been interested in nature and finding examples of how various creatures would cause their own doom. – via Medievalists.net
For examples of these fables, more images and link to all of Leonardo da Vinci’s fables, and those of other Italian writers in Renaissance Fables, translated by David Birch – see http://www.medievalists.net/2014/03/30/fables-leonardo-da-vinci/