But when the Bishop returned to Liége, on the death of Charles and the accession of the Duchess Marie, de la Marck hastened to make peace. The Bishop granted him a pardon, made him Captain of the Guard and Governor of Franchimont, rebuilt the Castle of Aigremont, and loaded him with favours. But it was soon apparent that the Wild Boar was untamed. He set the rules of the Church at defiance, refused to go to Mass or confession, insisted on eating what he pleased in Lent, ruled all who were under his authority with a rod of iron, made himself universally hated by the nobles, and at last, taking offence at the remonstrances of the Bishop, resigned his appointments, and left the Court. It having been discovered that he was in correspondence with Louis XI., who was plotting the annexation of the Principality, a sentence of banishment was pronounced against him as a traitor. He retired into the Ardennes, where, assisted by gifts of arms and gold from France, he gathered a strong band of French, German, and Swiss adventurers. Suddenly, in August, 1482, news came to Liége that the Wild Boar was on the march at the head of 4,000 horse and foot. The Bishop went forth to give him battle on the slopes of the Chartreuse, on the right bank of the river opposite the town. De la Marck, hearing from his spies that the Bishop was coming on in front of his main body, and attended only by a feeble escort, lay in wait for him at a difficult part of the ascent. The surprise was complete, and the escort was cut to pieces. The Bishop, alone in the hands of his enemy, cried out: 'Grâce! Grâce! Seigneur d'Arenberg, je suis votre prisonnier!' But one of de la Marck's followers struck him on the face. De la Marck himself drew his sword, and wounded him in the neck, and, turning to his men, told them to make an end of it. In an instant the Bishop fell from his horse a dead man. They stripped his body, and left it lying in the mud for hours; and it was with difficulty that the clergy obtained permission to bury him with the honours due to his station.[58] De la Marck, now master of the situation, called together the clergy of the diocese, and pressed them to choose a new Bishop, suggesting his own son, Jean d'Arenberg, a young man who was not yet a priest, as the most suitable person. Some of the canons, with whom the election lay, left Liége to escape voting. Those who remained were terrified into obedience, and the Wild Boar's son was declared Bishop. De la Marck, at the same time, appointed himself Governor of the Principality.