Mr. Vimes had told him never to get too excited about clues, because clues could lead you a dismal dance. They could become a habit. You ended up finding a wooden leg, a silk slipper and a feather at the scene of a crime and constructing an elegant theory involving a one-legged ballet dancer and a production of Chicken Lake.
Don't forget to invert the colors of that magical (((Black Cube))) of Mecca.