The development of this system led to the institution of the Hundred,[9] which, as its name implies, was a group of ten tythings, under a responsible head. Hundreds as well as tythings had definite police functions to perform: when a crime was committed, information had to be at once given to the hundred-men and tythingmen of the district, and it was their duty to pursue, arrest, and bring to justice all peace-breakers. In the event of the non-appearance of a culprit at the court of justice to which he was summoned, his nine fellow-pledges were allowed one month in which to produce him, when, if he was not forthcoming, a fine was exacted, the liability falling, in the first place, on any property of the fugitive that might be available, in the second place, on the tything, and,--should both these sources prove insufficient to satisfy the claim,--on the Hundred.[10] Furthermore the headboroughs were required to purge themselves on oath, that they were not privy to the flight of the offender, and to swear that they would bring him to justice if possible. On the other hand, if any member of a tything was imprisoned for an offence, it was not customary to release him without the consent of his fellow-pledges, even though the fine had been paid.[11] The practice of levying police fines from hundreds and tythings was an old one, and the limits of its application were clearly defined by Edgar: "and let every man so order that he have a surety, and let the surety then bring and hold him to every justice: and if anyone do wrong and run away, let the surety bear that which he ought to bear. But if it be a thief, and if he can get hold of him within twelve months, let him deliver him up to justice, and let be rendered unto him what he before has paid."[12] The fines[13] that were exacted, called respectively fightwitt, grithbryce, and frithbrec, differed in character, and varied in amount. When several persons had participated in a common crime the fine was payable by all who had a hand in it; an infraction of the peace by seven associates constituted a riot, and if thirty-five persons were concerned, the breach amounted to a rebellion.