في 1077، حرض روبرت له التمرد الأول ضد والده كنتيجة لمزحة لعبت باخوته الأصغر سنا وليام روفوس و هنري، الذين كانت ملقاة وعاء دائرة كاملة فوق رأسه.
In 1077, Robert instigated his first insurrection against his father as the result of a prank played by his younger brothers William Rufus and Henry, who had dumped a full chamber-pot over his head.