Giorgio Vasari, Lives of the Most Excellent Painters… (1850)
“ Michelagnolo had remarkable strength of memory, insomuch that, after having once seen a work of any other artist he would remember it so perfectly that, if it pleased him to make use of any portion thereof, he could do so in such a manner that none could perceive it. In his youth he was once supping with some painters his friends, when they amused themselves with trying who could best produce one of those figures without design and of intense ugliness, such as those who know nothing are wont to scratch on the walls. ”
