Children in Sigil, like children anywhere, play at being soldiers and wizards and lords of state. But in the Cage, there's one profession that inspires the best games, and that profession is the courier. Children race from street corner to doorway to midden heap delivering 'secret messages', finessing their way past clumsy guards and stodgy servants, and dodging ambushes to arrive safely back at the mysterious Palace of the Jester.