Brewer (54) explains that this refers “to the Central Criminal Court of the City of London … situated in the thoroughfare of that name.” He goes on to surmise that the word comes from the Latin ballium, meaning enclosure: that area enclosed by the city wall. Walters (301) adds that the outer wall of a castle is called a bailey. The “Ancient Bailey” to which the judge later refers is a variation on its usual sobriquet “Old Bailey.”