A twelfth-century apprentice Everwinus sits practicing flourished decoration while his master Hildebertus turns from his beautifully-appointed work desk to curse and shout at a mouse running off with his cheese. Augustine, De Civitate Dei. First half of the XII c.
Prague, The Metropolitan Chapter Library. Ms. A XXI/1. f. 153v. After Christopher De Hamel, Medieval Craftsmen. Scribes and Illuminators (London: British Museum Press, 1992), pic. 53, p. 61.