The bishops must always be considered in the double capacity of clerks and barons. Their courts, therefore, had a double jurisdiction: over the clergy and laity of their diocese for the cognizance of crimes against ecclesiastical law, and over the vassals of their barony as lords paramount. But these two departments, so different in their nature, they frequently confounded, by making use of the spiritual weapon of excommunication to enforce the judgments of both; and this sentence, cutting off the party from the common society of mankind, lay equally heavy on all ranks: for, as it deprived the lower sort of the fellowship of their equals and the protection of their lord, so it deprived the lord of the services of his vassals, whether he or they lay under the sentence. This was one of the grievances which the king proposed to redress. As some sanction of religion is mixed with almost every concern of civil life, and as the ecclesiastical court took cognizance of all religious matters, it drew to itself not only all questions relative to tithes and advowsons, but whatever related to marriages, wills, the estate of intestates, the breaches of oaths and contracts,--in a word, everything which did not touch life or feudal property. The ignorance of the bailiffs in lay courts, who were only possessed of some feudal maxims and the traditions of an uncertain custom, made this recourse to the spiritual courts the more necessary, where they could judge with a little more exactness by the lights of the canon and civil laws. This jurisdiction extended itself by connivance, by necessity, by custom, by abuse, over lay persons and affairs. But the immunity of the clergy from lay cognizances was claimed, not only as a privilege essential to the dignity of their order, supported by the canons, and countenanced by the Roman law, but as a right confirmed by all the ancient laws of England.