While Gustavus Adolphus made himself master of the Rhine, and threatened the three neighbouring electorates with his victorious arms, his vigilant enemies in Paris and St. Germain's made use of every artifice to deprive him of the support of France, and, if possible, to involve him in a war with that power. By his sudden and equivocal march to the Rhine, he had surprised his friends, and furnished his enemies with the means of exciting a distrust of his intentions. After the conquest of Wurtzburg, and of the greater part of Franconia, the road into Bavaria and Austria lay open to him through Bamberg and the Upper Palatinate; and the expectation was as general, as it was natural, that he would not delay to attack the Emperor and the Duke of Bavaria in the very centre of their power, and, by the reduction of his two principal enemies, bring the war immediately to an end. But to the surprise of both parties, Gustavus left the path which general expectation had thus marked out for him; and instead of advancing to the right, turned to the left, to make the less important and more innocent princes of the Rhine feel his power, while he gave time to his more formidable opponents to recruit their strength. Nothing but the paramount design of reinstating the unfortunate Palatine, Frederick V., in the possession of his territories, by the expulsion of the Spaniards, could seem to account for this strange step; and the belief that Gustavus was about to effect that restoration, silenced for a while the suspicions of his friends and the calumnies of his enemies. But the Lower Palatinate was now almost entirely cleared of the enemy; and yet Gustavus continued to form new schemes of conquest on the Rhine, and to withhold the reconquered country from the Palatine, its rightful owner. In vain did the English ambassador remind him of what justice demanded, and what his own solemn engagement made a duty of honour; Gustavus replied to these demands with bitter complaints of the inactivity of the English court, and prepared to carry his victorious standard into Alsace, and even into Lorraine.