It was an awkward moment, and perhaps few others would have escaped from it as did the light-hearted Dick. He gazed at the man in amazement. He stamped his feet with seeming rage and fumed and growled loudly. "What! You ask for papers while shells fall into the city and there is fighting! You expect me to take such things into the trenches, then? What next! I keep such things in my quarters where you can see them if you come with me." "Ah! Pardon, I did not think," the sentry answered abjectly. "Of course, it is not the time to make such a demand." "As if one could enter or leave the city!" growled Dick, pretending to be only half appeased. "But there! let it pass. Tell me for what reason is there a guard-house yonder?" "To house the patrols who police the streets. In times of peace the place is unoccupied." "And now?" asked Dick curiously. "There are a few men there. I myself shall be relieved by one of them." "And prisoners?" The sentry looked astonished. "Prisoners?" he asked, looking suspiciously at Dick. "Yes, prisoners," declared that young fellow without a falter. The high hand he had played already had served his purpose wonderfully. Then why not continue? "Did I not say prisoners plainly?" he asked curtly, at which the man nodded abjectly. "Then why this surprise?" "But--but pardon, sir, you asked as if it were not merely curiosity. It seemed as if you might be interested in some other way," said the sentry, emboldened for the moment and again surveying Dick in a manner which, if it did not show suspicion, at least told of his dislike of all foreigners. As for the midshipman, his interest was stimulated by the curious stubbornness of the man. Dick recollected that he was in search of Major Harvey, and that the latter had disappeared, had failed to signal to the airship, and was lost for the moment. Supposing there were prisoners yonder? Supposing this fellow and his mates placed in the guard-house to police the neighbourhood of the mosque had seized upon the Major and were holding him a prisoner? Was it likely that they had reported their action? Hardly at such a time when the allies were pressing an attack, and if they had sent in a report a day before, no doubt in the hurry and bustle of hastening troops to meet that expected assault the matter had been forgotten. However, this was all guesswork. Dick had yet no certain information that prisoners were located in the guard-house, though he had his suspicions. "And I'm pretty sure that this fellow is trying to throw dust in my eyes," he told himself. "It ain't difficult either to see why he's so stubborn and sly. I'm a foreign officer attached to the Turkish army. Half a mo'; I ain't. But that's what he takes me to be. Well, then, supposing he and his fellows had bagged the Major, they'd expect me to kick up a shindy and----" In one instant he saw it all, and his suspicions were heightened.