From Notker the Stammerer's life of Charlemagne, book 1, section 34. The emperor was complaining about the fashion for short Gaulish cloaks.

"What is the use of these little napkins?" he asked. "I can't cover myself with them when in bed. When I am on horseback I can't protect myself from the winds and the rain. When I go off to empty my bowels, I catch cold because my backside is frozen."