Lord Derby had at this time to encounter much unpopularity. He was accused of an undue leaning towards the Turkish Government, and an inadequate sympathy with the Christian populations, and it was alleged that if he had acted in firm concert with the other Powers in coercing the Porte--if he had not proclaimed so loudly and constantly his determination to abstain from all active interference and compulsion--his remonstrances would have had more effect, and he might have averted or restricted the calamities that had occurred. But a great change soon took place. The first object of the Government was to prevent the Turkish disturbance from leading to a European war, and in this object they failed. On April 24, 1877, Russia, in spite of English remonstrances, declared war against Turkey. On the same day a Russian army crossed the Pruth, and the Eastern Question entered into a new and dangerous phase. To a statesman like Lord Derby, who maintained that war, unless it is a necessity, is a crime; that the maintenance of peace is beyond all comparison the greatest of British interests, the months that followed were extremely trying. His first object was to limit the war, and to safeguard English interests, and for this purpose he drew up on May 6, 1877, a Note defining the English interests that were vital in the East. He warned the Russian Government that an attempt by Russia to blockade the Suez Canal, an attack on Egypt, a Russian occupation of Constantinople, or an alteration of the existing arrangements for the navigation of the Bosphorus or the Dardanelles might compel England to abandon her neutrality. Russia accepted these conditions, and for some time there appeared every prospect of limiting the war. But in the beginning of 1878 a period of extreme danger undoubtedly arrived. Plevna had fallen. The Turkish resistance had collapsed. A Russian army, flushed with victory, had advanced to near Constantinople. The treaty of San Stephano was signed; which in the opinion of most European statesmen placed Turkey at the feet of Russia, and Russia at first refused to submit its terms to a conference of European Powers. Public feeling in England now ran strongly in a direction almost opposite to that in which it had been running eighteen months before, and the nation was extremely alarmed at the danger of Constantinople becoming speedily and irremediably a Russian port. On the other hand, the national and military pride of the conquering Power was aroused, and it was felt that a single false step, a single imprudent menace, might lead to war.