The Spaniards had thus been successfully driven from the Isle of Walcheren, leaving the Hollanders and Zealanders masters of the sea- coast. Since the siege of Alkmaar had been raised, however, the enemy had remained within the territory of Holland. Leyden was closely invested, the country in a desperate condition, and all communication between its different cities nearly suspended. It was comparatively easy for the Prince of Orange to equip and man his fleets. The genius and habits of the people made them at home upon the water, and inspired them with a feeling of superiority to their adversaries. It was not so upon land. Strong to resist, patient to suffer, the Hollanders, although terrible in defence; had not the necessary discipline or experience to meet the veteran legions of Spain, with confidence in the open field. To raise the siege of Leyden, the main reliance of the Prince was upon Count Louis, who was again in Germany. In the latter days of Alva's administration, William had written to his brothers, urging them speedily to arrange the details of a campaign, of which he forwarded them a sketch. As soon as a sufficient force had been levied in Germany, an attempt was to be made upon Maestricht. If that failed, Louis was to cross the Meuse, in the neighbourhood of Stochem, make his way towards the Prince's own city of Gertruidenberg, and thence make a junction with his brother in the neighbourhood of Delft. They were then to take up a position together between Harlem and Leyden. In that case it seemed probable that the Spaniards would find themselves obliged to fight at a great disadvantage, or to abandon the country. "In short," said the Prince, "if this enterprise be arranged with due diligence and discretion, I hold it as the only certain means for putting a speedy end to the war, and for driving these devils of Spaniards out of the country, before the Duke of Alva has time to raise another army to support them."