‘_Quartum Corrolarium est_: When any subject and vassal to the king shall make alliances with those who are mortal enemies to his sovereign and kingdom, he cannot exculpate himself from being guilty of treason; more especially when he shall send advice to the men at arms of the enemy not to surrender any forts they may have gained in the kingdom,—for that when he shall be employed against them he will afford them succour. And beside, when he not only shall prevent the march of any armies against such enemies, but shall encourage them by secret and underhand means, he is a traitor to his king and country, and is deserving of the double death.

‘_Quintum Corrolarium est_: If any subject or vassal shall, through deceit and false information, sow the seeds of dissention between the king and queen, by telling the latter that the king hates her so mortally he is determined on having her and her children put to death, and that she has no other remedy to prevent this but flying out of the kingdom with her children; advising her strongly at the same time, to put this plan into execution, and offering to conduct her out of the realm to any castle she may please, adding with much subtilty, and by way of caution, that the queen must keep this advice very secret, lest she may be prevented from following it; and if, in order to accomplish this plan, he propose to the queen that she should undertake different pilgrimages until she be in a place of safety, intending by this means to confine her and her children in some of his prisons, and to gloss it over to the king, so that he may succeed him in his crown and kingdom. Any subject guilty of such a crime commits high treason in the second, third and fourth degrees. This is such an apparent truth that should I wish to prove it, ‘esset adjuvare cœlum facibus.’

The Chronicles of Enguerrand de Monstrelet Vol. 1 of 13 — Part 138

‘_Sextum Corrolarium est_: If any subject or vassal, through ambition to obtain a crown and kingdom, shall visit the pope, and impose on him, by imputing falsely and wickedly crimes and vices against his king and sovereign lord, which would be blots in his royal issue, concluding thence that such a king is unworthy to reign, and his children unfit to succeed him, and requiring most urgently of the pope that he would issue a declaration to the effect of depriving the king and his children of the crown; and likewise declaring, that the kingdom had devolved to him and his race, requesting that the pope would grant absolution to all the vassals of the realm who should adhere to him, giving them a dispensation for the oaths of fidelity that all subjects are obliged to take to their king,—such as may commit the above crime are disloyal traitors to their sovereign, and guilty of high treason in the first and second degrees.

The Chronicles of Enguerrand de Monstrelet Vol. 1 of 13 — Part 138