It was said that [Vetinari] would tolerate absolutely anything apart from anything that threatened the city*... [Footnote] And mime artists. It was a strange aversion, but there you are. Anyone in baggy trousers and a white face who tried to ply their art anywhere within Ankh's crumbling walls would very quickly find themselves in a a scorpion pit, on one wall of which was painted the advice: Learn The Words.

Author: Terry Pratchett