"Yes, sir; and you jolly well boomed him off. He didn't appear to like it." "He's got some infernal scheme under way. He's just told the other fellows, who are evidently inferior in rank to him in spite of his rig as a Turkish bluejacket, that he hasn't been at all successful at pumping us, up to the present, but that he means to have another shot at it. Failing this, he hints at strong measures, so we must be prepared to undergo a little discomfort." "What do you propose to do, sir?" "Let him have it hot if he starts his 'Me friend of Englis officers'. This room would be all right for half a dozen rounds. I think I could alter the shape of his figurehead. Hello, there's that seaplane returning, and, by Jove, they're firing!" The officers rushed to the windows once more. Although they could not see immediately overhead, they had a fairly comprehensive view of the sky from west through north to north-east. The courtyard was now filled with Turkish soldiers and sailors, all roused at the noise of the approaching air-craft. Most of them had their rifles and were preparing to open fire, while upon the broad rampart on the far side men were making ready with a couple of anti-aircraft guns. "One of our sea-planes in pursuit, I think," observed Farnworth excitedly. "I think you're right. Hello--here's the Turkish aeroplane." The monoplane was travelling fast in a northerly direction. The pilot was not visible, but the observer had faced about and was firing with a rifle at the pursuer, which had not yet come within the British officers' range of vision. Even as Dick and his companion watched, a bullet cut through a pair of tension wires to the right-hand main plane. The sea-plane started to bank, slipped, and fell sideways like a wounded bird. More and more it tilted till both pilot and observer were flung from their seats. Frantically grasping the thin air they dropped with ever-increasing velocity, till their line of descent was hidden by the intervening buildings; but the officers distinctly heard two separate thuds as the bodies struck the earth. With its propeller still revolving rapidly, the disabled monoplane described erratic curves. Suddenly the Turkish soldiers bolted for dear life, as the uncontrollable air-craft plunged almost vertically downwards into the courtyard. With a fearful crash it landed twenty yards from the window at which the Sub and his companion had taken stand. The litter of framework and canvas trailed on the ground like the gear of a dismasted racing yacht; then, as the petrol took fire, a column of flame rose fifty feet in the air. "There she is!" almost shouted the midshipman. Less than two hundred feet above Fort Medjidieh glided a large biplane. The motor had been switched off, for the crew had vol-planed down from a far greater height in order to make sure of their work.