The effect of the lawlessness of these mediæval students upon the history of the University was considerable. It is reflected in the statute book. It came to be recognised that their riotous behaviour was not only scandalous but also a veritable danger, which threatened the very existence of Oxford as a seat of learning. Politically, too, their behaviour was intolerable. Each outbreak, therefore, and each revelation of the licence of unattached students, who were credited with the chief share in these brawls, were arguments in favour of the college system inaugurated by the founder of Merton College. As early as 1250 it had been found necessary to provide that every scholar should have his own master, on whose roll his name should be entered, and from whom he should hear at least one lecture daily. And in 1420 Henry V. issued some ordinances for academical reform, with the object of tightening the bonds of discipline. They were reduced to a statute of the University immediately. Fines were imposed for threats of personal violence, carrying weapons, pushing with the shoulder or striking with the fist, striking with a stone or club, striking with a knife, dagger, sword-axe or other warlike weapon, carrying bows and arrows, gathering armed men, and resisting the execution of justice, especially by night. All scholars and scholars' servants, it was enacted, were, on first coming to Oxford, to take the oath for keeping the peace, which had hitherto been taken by graduates only; they were no longer to lodge in the houses of laymen, but must place themselves under the government of some discreet principal, approved by the Chancellor and regents. Chamberdekens were to lodge at a hall where some common table was kept. Thus the "unattached student," who has been recently revived, was legislated out of existence.