The passion and violence of the elder son had the natural effect of making the father take the part of the younger ones, and Robert was so much incensed, that he rode off with his friends, and, collecting partisans as he went, attacked Rouen.
He was of course repulsed, and many of his followers were made prisoners. He held out in the border counties for a little while, but all his supporters were gained from him by his father, and he at length came back to court, and appeared reconciled. There, however, he had nothing to do, and all the licentious and disaffected congregated round him; he idled away half his time, and revelled the rest, and his pretensions magnified themselves all the time in his fancy, till at last he was stimulated to demand of his father the cession of Normandy, as a right confirmed to him by the French king.
William replied by a lecture on disobedience, citing as examples of warning all the Absaloms of history; but Robert fiercely answered, that he had not come to listen to a sermon; he was sick of hearing all this from his teachers, and he would have his answer touching his claim to Normandy.
The answer he got was, “It is not my custom to lay aside my clothes till I go to bed.”
It sent him off in a rage, with all his crew of dissolute followers. He went first to his uncle in Flanders, then to Germany and Italy, always penniless from his lavish habits, though his mother often sent him supplies of money by a trusty messenger, called Samson le Breton. However, the King found him out, and reproached Matilda angrily; but she made answer, “If Robert, my son, were buried seven feet under ground, and I could bring him to life again by my heart’s blood, how gladly would I give it!” The implacable William commanded Samson to be blinded, but he escaped to the monastery of St. Everard, and there became a monk.
Returning, Robert presented himself to King Philippe of France, who was glad to annoy his overgrown vassal by patronizing the rebellious son, and accordingly placed Robert in the Castle of Gerberoi, where he might best be a thorn in his father’s side. There William besieged him, bringing the two younger sons with him, though Henry was but twelve years old. For three weeks there was sharp fighting; and, finally, a battle, in which the younger William was wounded, and the elder, cased in his full armor of chain mail, encountered unknowingly with Robert, in the like disguising hawberk. The Conqueror’s horse was killed; his esquire, an Englishman, in bringing him another, was slain; and he himself received a blow which caused such agony that he could not repress a shriek of pain. Robert knew his voice, and, struck with remorse, immediately lifted him up, offered him his own horse, and assured him of his ignorance of his person; but William, smarting and indignant, vouchsafed no answer, and while the son returned to his castle, the father went back to his camp, which he broke up the next day, and returned to Rouen.