Canning used the thunder of his country freely in pursuance of his own policy. He was undoubtedly the main cause of the war which soon ensued between Great Britain and Russia. Meanwhile the reform of its administration and its laws had long been recognized by the very few honest and capable statesmen of Turkey as indispensable to the maintenance of its Empire. Mahmoud himself, in the latter part of his life, had appreciated this necessity, and had given his sanction to a scheme of reform. But death came to him before it was issued. He must have instructed his son as to this policy, for one of the first acts of Abdul Mehzid, by the advice of his Grand Vizier, Reschid Pasha, was to issue the important declaration of reform which had been prepared by Mahmoud, and was known as the Hatti-Scheriff of Ghulkané. It promised equally to all his subjects, without distinction of creed or race, security of life, of honour, and of property, the equitable distribution of taxes, the public trial of all prisoners, the right of all to hold and devise property, and the systematic recruiting of the army. It appointed a council to elaborate the details of administrative reform to give effect to these principles. But this great charter of reform lacked the will of a Mahmoud to enforce it. There ensued a dangerous reaction. Reschid Pasha was compelled to resign. Riza Pasha, who succeeded him, and his colleagues, were reactionary, fanatical, and anti-Christian. The Hatti-Scheriff, like almost every other promise of reform in Turkey, became a dead letter. Riza was also corrupt and venal, and robbed the treasury of untold sums. It became the principal object of Canning to obtain the dismissal of this man and of the gang of peculators who worked with him, and the reinstatement of Reschid. Proposals for reform in favour of the rayas were impossible with ministers who carried their hatred of Christianity to the length of excluding from the public service every Turk who could speak a Christian language. By dint of long and patient efforts Canning obtained such a mastery over Abdul Mehzid that he was able to bring about a change of ministers, and to reinstate Reschid Pasha as the only statesman in Turkey who was capable of carrying out reforms, and who was willing to be guided by himself as to their main principles. In 1852 a serious diplomatic dispute broke out at Constantinople, between the representatives of France and Russia, as to the guardianship of the Holy Sepulchre at Jerusalem and many trumpery details connected with it. Early in 1853 there were strong indications that the Emperor Nicholas intended to take the opportunity of this dispute to raise a much more serious question against the Porte. He evidently desired to disarm the opposition of England to his schemes. In a private conversation at St. Petersburg with Sir Hamilton Seymour, the British Ambassador at his Court, he opened his mind:—