An Arab city of the early medieval period. Urban centers in the Middle East were of a size and wealth all but unknown in the Christian west during this period, encouraging the development of a large and diverse fraternity of criminals. From a contemporary manuscript.

The year is—let us say—1170, and you are the leader of a city watch in medieval Persia. Patrolling the dangerous alleyways in the small hours of the morning, you and your men chance upon two or three shady-looking characters loitering outside the home of a wealthy merchant. Guessing that you have stumbled across a gang of housebreakers, you order them searched. From various hidden pockets in the suspects’ robes, your men produce a candle, a crowbar, stale bread, an iron spike, a drill, a bag of sand—and a live tortoise.

The reptile is, of course, the clincher. There are a hundred and one reasons why an honest man might be carrying a crowbar and a drill at three in the morning, but only a gang of experienced burglars would be abroad at such an hour equipped with a tortoise. It was a vital tool in the Persian criminals’ armory, used—after the iron spike had made a breach in a victim’s dried-mud wall—to explore the property’s interior.

We know this improbable bit of information because burglars were members of a loose fraternity of rogues, vagabonds, wandering poets and outright criminals who made up Islam’s medieval underworld. This broad group was known collectively as the Banu Sasan, and for half a dozen centuries its members might be encountered anywhere from Umayyad Spain to the Chinese border. Possessing their own tactics, tricks and slang, the Banu Sasan comprised a hidden counterpoint to the surface glories of Islam’s golden age. They were also celebrated as the subjects of a scattering of little-known but fascinating manuscripts that chronicled their lives, morals and methods. Continue reading →