It was Oliver's head--not his heart--that was at fault. But a few days after these words were spoken, Charles X. was tramping with his army over the ice of the two Belts, in that marvellous march which landed him in Zealand, and compelled Frederick III. to sign the Treaty of Roeskilde which abandoned to Sweden the Danish possessions to the east of the Sound. What then were Oliver's Ambassadors doing when that treaty was negotiating? They were but arguing as any Dutchman or Brandenburger might have argued, on behalf of the material interests of their own country. They favoured Charles's wish to annex the Danish provinces beyond the Sound, because it would leave the passage into the Baltic under the control of two Powers instead of one. They opposed his wish to annex more than two provinces of Norway, in order that the monopoly of the timber trade might not fall into his hands. Of the Protestant alliance not a word was spoken. For all that, the Protestant alliance had not passed out of Oliver's mind. Now that Denmark was crushed, Charles professed himself to be quite ready to attack Leopold of Austria, if only he were allowed to crush Brandenburg first; and in May an English Ambassador was sent to Berlin to plead with the Elector of Brandenburg to join England and Sweden against Leopold, to whose support Frederick William was looking against an unprovoked attack from Charles. Happily for England, Frederick William refused to countenance this insane proposal, and in August Charles renewed the war against Denmark, with a fixed determination to bring the whole of the Scandinavian territory under his own sway, before he involved himself in those further complications in Germany, in which Oliver, supported by Mazarin, was anxious to involve him. "France," said the King of Sweden, "wants to limit me and to prescribe the course I am to take, and England attempts to do the same, but I will put myself in a position to be independent of their orders." His Ministers spoke even more openly of their future plans. When Denmark and Norway had been annexed, and the Baltic brought under the undisputed control of Sweden, Courland and West Prussia must inevitably pass into their master's hands. Then with an army of 40,000 men, supported by a navy of 100 ships, the Swedish army would march through Germany into Italy, visit the Pope, and plunder Rome. "Their first thought is pillage," added the French Ambassador who reported these vapourings perhaps not without exaggeration. Charles X. was a great soldier, but he was by no means the oppressed saint of Oliver's imagination.