"Yes, come along," Vere replied. "The matter is of interest, and for the life of me I cannot make out what this obstacle can be of which our host speaks."

They at once set out.

John Menyn led them to a warehouse close to the western wall, and spoke a few words to its owner, who at once took three lanterns from the wall and lighted them, handing one to Vere, another to John Menyn, and taking the other himself; he then unlocked a massive door. A flight of steps leading apparently to a cellar were visible. He led the way down, the two men following, and the boys bringing up the rear. The descent was far deeper than they had expected, and when they reached the bottom they found themselves in a vast arched cellar filled with barrels. From this they proceeded into another, and again into a third.

"What are these great magazines?" Francis Vere asked in surprise.

"They are wine-cellars, and there are scores similar to those you see. Sluys is the centre of the wine trade of Flanders and Holland, and cellars like these extend right under the wall. All the warehouses along here have similar cellars. This end of the town was the driest, and the soil most easily excavated. That is why the magazines for wines are all clustered here. There is not a foot of ground behind and under the walls at this end that is not similarly occupied, and if the Spaniards try to drive mines to blow up the walls, they will simply break their way into these cellars, where we can meet them and drive them back again."

"Excellent!" Francis Vere said. "This will relieve us of the work of countermining, which is always tiresome and dangerous, and would be specially so here, where we should have to dive under that deep moat outside your walls. Now we shall only have to keep a few men on watch in these cellars. They would hear the sound of the Spanish approaching, and we shall be ready to give them a warm reception by the time they break in. Are there communications between these cellars?"

"Yes, for the most part," the wine merchant said. "The cellars are not entirely the property of us dealers in wine. They are constructed by men who let them, just as they would let houses. A merchant in a small way would need but one cellar, while some of us occupy twenty or more; therefore, there are for the most part communications, with doors, between the various cellars, so that they can be let off in accordance with the needs of the hirers."

"Well, I am much obliged to you for telling me of this," Captain Vere said. "Williams and Morgan will be glad enough to hear that there is no fear of their being blown suddenly into the air while defending the walls, and they will see the importance of keeping a few trusty men on watch in the cellars nearest to the Spaniards. I shall report the matter to them at once. The difficulty," he added smiling, "will be to keep the men wakeful, for it seems to me that the very air is heavy with the fumes of wine."

CHAPTER IV.

THE SIEGE OF SLUYS.