Novgorod, fearing the power of Ivan, sought his good-will, offered friendship, and did not refuse to send Moscow more tribute than it had sent Vladimir. As Prince of Novgorod he might have been satisfied with the tribute, and the honor with which Novgorod strove to placate him, but as chief of all Russia he was not content with this; he demanded what the city owed to all Russia. Ivan would never yield to Novgorod when it claimed single ownership of regions beyond the Volok, nor would he pardon its boyars for threatening to favor Lithuania. On those points he warred with the city at all times. During his reign he made Novgorod feel very clearly that he did not ask an extra thousand of grievens to build up Moscow, but that the boundaries fixed from the days of Yuri Dolgoruki, Andrei Bogolyubski, and Big Nest must be given to Vladimir. Besides he showed the Novgorod men that not to their city alone, but to all Russia, was open the road to the whole northern country. And the region beyond the Ural Mountains, the Kamen, as it was then called (beyond the Kamen meant Siberia) was, as Ivan considered it, the property, not of Novgorod alone, but of all Russia. Novgorod, however, insisted most stubbornly that those regions belonged to her exclusively. The Moscow prince would not concede this claim, and watched with the utmost care those relations which then began between Novgorod and Lithuania. The boyars of Novgorod not only considered that they had a right to invite a prince from Lithuania, but apparently they were ready to place Novgorod under Lithuanian protection, if thus they could keep independent of other princes, and preserve to their city those rich, boundless lands on the north and the east. Ivan would not admit for a moment that they had the right to call in a foreign prince, or owned exclusively those lands which they claimed for their own. In 1332, when returning from the Horde, Ivan made a demand in the name of the Khan to which the people of Novgorod gave a stern refusal. He insisted, and to make sure of their compliance he seized the Upper Baijets and Torjok immediately. From that began a long quarrel. At times Novgorod seemed to yield, and the quarrel apparently ceased; again it would blaze up on the city’s renewed refusal. Thus the dispute continued during Ivan’s reign. The main cause of the dispute was the silver beyond the Ural Mountains. Ivan demanded from Novgorod an income from places claimed by the city, no part of which income should go to any prince ruling in Novgorod. He wished to extend taxes over all Novgorod possessions to the boundaries of Siberia.