Two events now occurred which materially affected the position of Turkey, and deprived Mahmoud of the fruits of his ably devised policy. The one was the death of Alexander, the Emperor of Russia, the other the decision of the British Government to intervene on behalf of Greece. Alexander for some years past had been on the horns of a dilemma. He had a deep sympathy for the subjects of the Ottoman Empire who were members of the Greek Church, and a great aversion to Turkish rule. But he also hated and feared revolution. He believed in the divine right of rulers, however bad, and would take no step to support the revolt of their subjects, however oppressive their government. He feared that a dangerous precedent might be extended to his own Empire. This conflict of views paralysed his action. He gave no assistance to the Greek insurgents. So long as he lived there was little hope that Greece would recover its independence. He died late in 1825, and was succeeded by his brother, Nicholas, a much younger and more vigorous man, and a truer exponent of Russian ideals. The new Czar had no objection to insurrection if it was not directed against his own government. He hated the Turks and wished to drive them out of Europe much more than he sympathized with the Greeks. He had many other grounds of complaint against the Porte. It has also been suggested that he wished to come to conclusions with it before time had been given for perfecting his new army. As regards Great Britain, its Government had not originally sympathized with the Greek revolution, but the reverse. But public opinion, outraged by the barbarities which had been committed, had produced an influence on it, and Mr. Canning, the Foreign Secretary, was personally very favourable to the cause of Greece. The Government as a whole held the view that the continuance of disorder in Greece was a menace to the peace of Europe. They had no wish for the extension of Russia at the expense of Turkey. They thought that if Greece were not pacified Russia would intervene, and would not confine its claim to the settlement of the Greek claims, but would aim at other conquests. They decided, therefore, to make an effort to settle the Greek question on the basis of autonomy, subject to the suzerainty of the Sultan. In this view the Cabinet sent the Duke of Wellington to St. Petersburg in 1826 to negotiate with the Czar. He effected an arrangement which was later embodied in the treaty of London of July 6, 1827, between the three Powers, Great Britain, Russia, and France, for the pacification of Greece. Under the terms of this treaty it was agreed, with a view to bringing about a reconciliation between the Ottoman Porte and the Greeks, to offer mediation, and to demand an immediate armistice as a preliminary to the opening of a negotiation.