Posted on Saturday, September 16th, 2006 at 19:30, under quotes. Tags:

The phrase “set a thief to catch a thief” had by this time (after strong representations from the Thieves’ Guild) replaced a much older and quintessential Ankh-Morporkian proverb, which was “Set a deep hole with spring-loaded sides, tripwires, whirling knife blades driven by water power, broken glass and scorpions, to catch a thief”.

Terry Pratchett – Guards! Guards!