CUSTUMAL: CAPITULUM 7

If an outlaw or someone who has abjured the realm returns to the city without the king's permission, and does not surrender himself, he is to be pursued with hue-and-cry and can be subject to immediate judgement, without the need to detain him [until gaol delivery]. If such a one is arrested and imprisoned, without it being realized at first that he is a fugitive, the gaoler is to ensure he is kept securely under guard until the delivery of the gaol.

[The local gaols were periodically "delivered" of their prisoners to itinerant royal justices who tried cases outside the jurisdication of borough authorities. Outlaws (or abjurers, after the period assigned them to quit the kingdom) could be killed by anyone who captured them, because they were outside the protection of the law until they obtained the king's pardon for their crimes.]