Cenek of Wartenberg and the other Bohemian nobles were naturally indignant at the conduct of their new allies. They therefore lent a willing ear to the envoys of Sigismund. Wartenberg, abandoning the national cause, concluded a private treaty with the King, that at first remained secret. On the condition that he, his family, and the tenants on his estates, should be allowed to worship according to the Utraquist creed, he consented to admit the Royal troops into the castle on the Hradcany. The citizens, exasperated by Wartenberg's treachery, endeavoured to recover possession of the castle, but their desperate attack was repulsed by the Royal troops. Simultaneously, fighting also began in the new town, the Royal troops that held the Vysehrad making a successful sortie and defeating the citizens of the new town. The Praguers now wished to negotiate with the King, while the Royal troops had also suffered severe losses. An armistice of six days was concluded, and the citizens sent another deputation to the King. Sigismund, who was then at Kutna Hora, received the envoys even more ungraciously than before. As the Praguers afterwards wrote to the Venetians: 'The King became harder than steel; as one stung by fury, he began to agitate his limbs as a madman.' He declared that it was his duty to destroy all heresy by fire and sword, even should he have to extirpate the whole population of Bohemia and colonise the country with foreign immigrants. On the return of the envoys another meeting of the citizens took place in the town hall of the Staré Mesto, where great enthusiasm prevailed. It was again decided that all should risk their lives and fortunes for the cause of religious freedom, and fight to the last. An Utraquist nobleman, Hynek Krusina of Lichtenberg, was chosen as commander-in-chief. A message was also sent to Zizka and the other Taborite leaders, stating that 'if they wished verily to obey God's law they should march to their aid without delay, and with as many men as they could muster.' After some skirmishing with the Royal troops, Zizka and his men arrived at Prague (May 20, 1420), where they were joyfully received by the citizens. From other parts of Bohemia also many nationalists hurried to the defence of the menaced capital. Hearing that the Praguers had received reinforcements, Sigismund did not march straight on Prague, but proceeded to Melnik, where he halted for some time. By his orders and those of the Papal Legate, Ferdinand, Bishop of Lucca, horrible cruelties were committed against the population of the neighbouring country, and particularly the citizens of Slané and Litomerice.[13] In a period of intense religious passion such cruelties inevitably led to reprisals. We read that the Hussites who were besieging the Hradcany burnt alive nine Romanist monks in view of the Royal garrison.