All of this was an accommodation that like other institutions in this country had grown up insensibly during the half-dozen centuries since the Norman Conquest. When those actual Normans had burst in on the place, they’d found a patch nearer to one acre in extent, shaped like the hoof-print of a horse, its flat side defined by the bank of the Fleet River (in those days, one phant’sied, a babbling rural freshet) and the rest of it bulging out to the east. In any case it had somehow picked up a privileged legal status: the Bishop of London had authority over all the land around it, but not this one-acre hoofprint. Which anomaly could presumably be traced back to some more or less interesting yarn involving mailed Angles whaling on each other with gory battle-axes, but none of that mattered now—what mattered was that this oddity had somehow been leveraged, over the better part of a millennium, into the hoofprint’s current status as the Prison for the Courts of Common Pleas, Chancery, Exchequer, and Curia Regis. It had served in like capacity for the Court of Star Chamber until that had been abolished, and so Drake had once been chained up here, before Daniel had been born. In those days, for that reason, it had been a more interesting place, and more profitable to the Warden. But now it was thought of almost entirely as a debtors’ prison. There were a few exceptions to that rule, which had lately become very important to Daniel. But in order for him to come to grips with the exceptions he had first to know and understand the norms .