"Here's the show," announced Sefton, pointing to a narrow passage between two immense artificial boulders. At one time the opening had been much wider, and had been provided with stone steps, but the irresistible shock had contracted the passage, and had buried most of the steps under a heap of rubble. "We want a lantern for the job," observed Dick. "How did you manage to see? You ought not to have gone on an exploring expedition without someone accompanying you." "I've brought my electric torch," said the midshipman, studiously ignoring the latter portion of the Sub's remarks. Unnoticed by the signalling party, the two young officers descended. For twenty yards they had to exercise considerable effort in order to negotiate the bulging sides, but beyond this the passage opened to a width of nearly six feet. "Mind where you tread," cautioned Sefton, flashing his lamp on the ground. "They are not dangerous, but it isn't pleasant." Either lying on the stone floor or propped up in a sitting position against the wall were the bodies of several Turkish infantrymen. Most of them were tunicless, while half a dozen 100-pounder shells lying on the ground showed that these men were engaged in bringing ammunition from the magazine when death in the form of lyddite fumes overtook them. There were no visible marks of wounds, so it was fairly safe to conclude that no shell had burst within the tunnel. Further, it showed that somewhere underneath the ruined fort was a still intact store of projectiles which would have to be rendered useless to the Turks before the demolition party returned to their ship. "Didn't those fellows give you a turn?" enquired Dick. "A bit at first," admitted the midshipman. "Then when I realized that if they had meant mischief they would have plugged me long before I saw them, I began to think something was wrong with them--and there was." For nearly a hundred feet the passage zigzagged. With the exception of the dip near the main entrance the floor was almost level. At intervals were niches covered with steel slabs. The place had been electrically lighted, but owing to the destruction of the power-house the lamps were extinguished. Sefton's surmise was correct. It was a magazine, for the peculiar pattern of the electric bulbs in their double glass coverings told Dick the reason for the precaution. "This is as far as I have been," announced Sefton, pointing to a heavy canvas screen. "Then we had better both go carefully," added Dick, drawing his revolver, an example that the midshipman eagerly hastened to follow. "Don't go letting rip, mind, without you want to blow the whole crowd of us to pieces. Use your revolver as a moral persuader if there should be any of the enemy skulking here."