So he drew comfort from being in the Khan el-Khalili, which appeared to be the quickest part of the city. The caravan wound through market-streets devoted to every good imaginable, from slaves to butter to live cobras, and eventually reached a place that, Jack thought, must be the dead center of the entire metropolis. It was a yard, or perhaps an alley: a rectangle of dirt, a bow-shot in length, but not above five yards in width, hemmed in by four-and five-storey buildings. Above, a narrow aperture provided light, but something translucent had been thrown across between the parapets of the buildings: caravan-tents and tarpaulins, Jack suspected. These formed a continuous roof overhead, letting in dusty light but sealing the place off from eavesdroppers. The surrounding buildings were astonishingly quiet—the quietest place in Cairo—and they smelled of hay. Ships coming down the Nile had replenished the place with food for the horses and camels that were stabled here.