The town of Sluy's and its situation have been described in a former chapter. As a port, it was in those days considered a commodious and important one, capable of holding five hundred ships. As a town, it was not so insignificant as geographical and historical changes have since made it, and was certainly far superior to Ostend, even if Ostend had not been almost battered out of existence. It had spacious streets and squares, and excellent fortifications in perfectly good condition. It was situate in a watery labyrinth, many slender streams from the interior and several saltwater creeks being complicated around it, and then flowing leisurely, in one deep sluggish channel, to the sea. The wrath of Leicester, when all his efforts to relieve the place had been baffled by the superior skill of Alexander Farnese, has been depicted, and during the seventeen years which had elapsed since its capture, the republic had not ceased to deplore that disaster. Obviously if the present expedition could end in the restoration of Sluy's to its rightful owners, it would be a remarkable success, even if Ostend should fall. Sluy's and its adjacent domains formed a natural portion of the Zeeland archipelago, the geographical counterpart of Flushing. With both branches of the stately Scheld in its control, the republic would command the coast, and might even dispense with Ostend, which, in the judgment of Maurice, was an isolated and therefore not a desirable military possession. The States- General were of a different opinion. They much desired to obtain Sluy's, but they would not listen to the abandonment of Ostend. It was expected of the stadholder, therefore, that he should seize the one and protect the other. The task was a difficult one. A less mathematical brain than that of Maurice of Nassau would have reeled at the problem to be solved. To master such a plexus of canals, estuaries, and dykes, of passages through swamps, of fords at low water which were obliterated by flood- tide; to take possession of a series of redoubts built on the only firm points of land, with nothing but quaking morass over which to manoeuvre troops or plant batteries against them, would be a difficult study, even upon paper. To accomplish it in the presence of a vigilant and anxious foe seemed bewildering enough.