A flat-bottomed, shallow-draft river-boat waited at the terminus of a canal that wandered through the city and eventually communicated with the Nile. It was only half a mile from the caravanserai, down a certain street, and the people who dwelled along that street had carried their chairs and hookahs indoors and rounded up their chickens and were keeping their doors bolted and windows shuttered today, because of certain rumors that had begun to circulate the night before.