The most dangerous part remained to cross, the much wider sound of Store Belt, in order to reach Seeland. Charles first thought of taking the direct route of two miles, but commissioned Dahlberg to explore the condition of the ice across to the smaller islands to the south. Dahlberg did so, and said he would wager his head for its perfectly safe condition. In enthusiasm, Charles clapped his hands exclaiming: “Now, brother Frederic, we will converse in good Swedish!” In the night between the 5th and 6th of February, the Swedish army marched from Svendborg in Funen over the ice to Langeland. “It was terrible,” wrote an eye-witness, “to march through the night over this frozen sea, where the horses’ hoofs had thawed down the snow on the ice, which was below two feet of water, and where we, in every moment, were in fear of striking the open sea.” At dawn the army landed in Langeland. During the rest for breakfast, frozen beer was chopped and distributed in pieces to the soldiers. The march continued over the still wider sound to Laaland, Eric Dahlberg in front, directing the march. Reaching Grimsted in Laaland at three o’clock in the afternoon, and proceeding to Nakskov, Charles Gustavus was met, at midnight, by the burgomaster and council of said town, who surrendered its keys. The 9th of February, the army stood in Falster, and a few days later was collected at the captured castle of Vordingborg in Seeland. Peace was hastily offered and agreed to on the 17th, and the treaty of peace signed the 28th of February, 1658, at Rœskilde. The conditions were severe, Denmark ceding the provinces of Scania, Halland, Bleking and Bohuslæn, the whole district or diocese of Drontheim in Norway, and the island of Bornholm, and agreeing to hold the Baltic closed to hostile fleets with the help of Sweden. The last clause was a piece of a Scandinavian policy devised by the Swedish king.