On 22 June, Ralph Shaa preached a sermon declaring that Edward IV had already been contracted to marry Lady Eleanor Butler when he married Elizabeth Woodville, thereby rendering his marriage to Elizabeth invalid and their children together illegitimate. The children of Richard's older brother George, Duke of Clarence, were barred from the throne by their father's attainder, and therefore, on 25 June, an assembly of Lords and Commons declared Richard to be the legitimate king (this was later confirmed by the act of parliament "Titulus Regius"). The following day he acceded to the throne as King Richard III.