The great Khan, Güyük, refused the invitation to become Christian, and demanded rather that the Pope and rulers of Europe should come to him and swear allegiance to him. The Khan did not dismiss the expedition until November. He gave them a letter to the Pope—written in Mongol, Arabic, and Latin—that was a brief imperious assertion of the Khan's office as the scourge of God. They began a long winter journey home. Often they had to lie on the bare snow, or on ground scraped bare of snow with a foot. They reached Kiev on 10 June 1247. There, and on their further journey, the Slavonic Christians welcomed them as risen from the dead, with festive hospitality. Crossing the Rhine at Cologne, they found the Pope still at Lyon, and delivered their report and the Khan's letter.