During the weeks that preceded the withdrawal of James II. to France violent riots had taken place in London, where several of the Catholic chapels were attacked, and in many of the other leading cities. William III. was not personally in favour of a policy of religious persecution, particularly as he had promised his imperial ally to deal gently with his Catholic subjects. But the popular prejudice against them was so strong that a policy of toleration was almost an impossibility. The Catholics were excluded specially from enjoying the concessions made in favour of the Dissenters, and in the Bill of Rights (1689) it was provided that no member of the reigning family who was a Catholic or had married a Catholic could succeed to the throne, and that any sovereign of England who became a Catholic or married a Catholic thereby forfeited the crown. Catholics were prohibited from residing within ten miles of London; magistrates were empowered to administer the objectionable oath of allegiance to all suspected Papists; Catholics were forbidden to keep arms, ammunition, or a horse valued for more than ten pounds; they were debarred from practising as counsellors, barristers, or attorneys; if they refused to take the oath they were not allowed to vote at parliamentary elections; they were incapacitated from inheriting or purchasing land; and prohibited from sending their children abroad for education; while priests were to be punished with imprisonment for life for celebrating Mass, and spies who secured the conviction of priests were offered £100 as a reward.[21]