"Maybe twenty-four hours, maybe three weeks, lad. These frosts when they set in like this seldom last less than a fortnight or three weeks. What do you think of our chances of being attacked?"

"I should say they are sure to attack us. The whole Spanish army is lying over there in Amsterdam, and as soon as the ice is strong enough to bear them you will see them coming out. How strong a force can we muster?"

"There are thirty craft," Peters replied; "and I should think they average fully fifteen men each -- perhaps twenty. They carry strong crews at all times, and stronger than usual now."

"That would give from five to six hundred men. I suppose all carry arms?"

"Oh, yes. I do not suppose that there is a man here who has not weapons of some kind, and most of them have arquebuses. It will take a strong force to carry this wooden fort."

It was still freezing intensely, and the ice was strong enough to bear men scattered here and there, although it would not have sustained them gathered together. Towards the afternoon the captain judged that it had thickened sufficiently to begin work, and fifty or sixty men provided with hatchets got upon the ice and proceeded to break it away round the vessels. After a couple of hours a fresh party took their places, and by nightfall the ships were surrounded by a belt of open water, some fifteen yards wide.