An earnest priest, Sylvester, forced himself upon the terrified Tsar, upbraided him for his excesses, and exhorted him to lead a better life. Ivan, always an arrant coward, now completely unnerved, at once came under the influence of the priest. He took as his counsellor one Adashef, a man of good repute and some wisdom. For thirteen years he and Sylvester administered the law and dictated the policy of the country. In Anastasia they had an able assistant and firm friend. Their first act was directed towards limiting the power of the Tsar; at their behest he called together an assembly of the people to advise him. They compiled a code of laws, the Sudebnik, and the Stoglaf, this last the decrees of the council (Zemstvo) held at Moscow in 1551 and shortly afterwards Sylvester issued his "Domostroi"--household law, teaching how to live as Godfearing men and prove good husbandmen. The Tsar, earnest in his new rôle, paid great attention to his spiritual advisers. When twenty-one he exhorted them to "Thunder in mine ears the voice of God that my soul may live." In 1552 he was persuaded to lead an expedition against the Tartars of Kazan. The army was strong and well equipped. With wonderful foresight, a neighbouring town had been well stocked with provisions and was used as a base for the besiegers. After a stubborn resistance Ivan's army of 150,000 took the town, and slaughtered the defenders. On this occasion Ivan is said to have displayed considerable courage, and when he saw the bodies of the slain Tartars, to have regretted their death, saying, "for though of another faith they are human beings even as ourselves." Too soon he returned to Moscow, and the newly-conquered province rebelled. Ivan then was very ill, "a fever so great all thought him at the point of death." Ivan thought his last hour was at hand and summoned the nobles to take the oath of fealty to his son Dmitri, whom he nominated his successor. Some refused, others hesitated: Zakharin-Yurief alone, was earnest and ready in his allegiance. He was a near kinsman of the Tsarina and so, more than any, was interested in the welfare of Dmitri. Others intrigued for the succession. The Tsar lying helpless on his couch heard the boyards and counsellors discussing their plans in the adjoining apartment. Even Sylvester and his trusted counsellor Alexis Adashef, favoured the succession of Vladimir, Ivan's cousin. Ivan recovered, but for a time he acted as though he had forgotten what he overheard on his sick bed. He never forgave. His wife, Anastasia, also withdrew her friendship from those who had opposed her son's succession.