They were leaning out of the dormer-window in the high roof watching the Spanish soldiers in the batteries working their guns, when, happening to look round, they saw a crossbow protruded from a window of the warehouse to their right, and a moment afterwards the sharp twang of the bow was heard. There was nothing unusual in this; for although firearms were now generally in use the long-bow and the cross-bow had not been entirely abandoned, and there were still archers in the English army, and many still held that the bow was a far better weapon than the arquebus, sending its shafts well nigh as far and with a truer aim. "If that fellow is noticed," Geoffrey said, "we shall have the Spanish musketeers sending their balls in this direction. The governor has, I heard Captain Vere say, forbidden shooting from the warehouses, because he does not wish to attract the Spanish fire against them. Of course when the wall yields and the breach has to be defended the warehouses will be held, and as the windows will command the breach they will be great aids to us then, and it would be a great disadvantage to us if the Spaniards now were to throw shells and fire-balls into these houses, and so to destroy them before they make their attack. Nor can much good be gained, for at this distance a cross-bow would scarce carry its bolts beyond the moat." "Most likely the man is using the cross-bow on purpose to avoid attracting the attention of the Spaniards, Geoffrey. At this distance they could not see the cross-bow, while a puff of smoke would be sure to catch their eye." "There, he has shot again. I did not see the quarrell fall in the moat. See, one of the Spanish soldiers from that battery is coming forward. There, he has stooped and picked something up. Hallo! do you see that? He has just raised his arm; that is a signal, surely." "It certainly looked like it," Lionel agreed. "It was a sort of half wave of the hand. That is very strange!" "Very, Lionel; it looks to me very suspicious. It is quite possible that a piece of paper may have been tied round the bolt, and that someone is sending information to the enemy. This ought to be looked to." "But what are we to do, Geoffrey? Merely seeing a Spanish soldier wave his arm is scarcely reason enough for bringing an accusation against anyone. We are not even sure that he picked up the bolt; and even if he did, the action might have been a sort of mocking wave of the hand at the failure of the shooter to send it as far as the battery." "It might be, of course, Lionel. No, we have certainly nothing to go upon that would justify our making a report on the subject, but quite enough to induce us to keep a watch on this fellow, whoever he may be. Let us see, to begin with, if he shoots again." They waited for an hour, but the head of the cross-bow was not again thrust out of the window.