From Steve Duin in a review of a Seattle Art Museum show:

Because the servant he was sending to market was illiterate, Michelangelo illustrated the shopping lists — a herring, tortelli, two fennel soups, four anchovies and ‘a small quarter of a rough wine’ — with rushed (and all the more exquisite for it) caricatures in pen and ink.

Biblioklept via Open Culture.