It may be wondered meanwhile what had happened to the gallant Major who had left the airship just two nights previous to Dick and his fellows. If they had but known the truth he had set foot in this beleaguered city within some fifty yards of the spot where they had landed. And then all his efforts had been concentrated on the task of finding that elusive individual known as Charlie. He groped his way around buildings and along streets; and for hours haunted the precincts of that huge mosque which the elusive Charlie had denoted as his probable location. The dawn was breaking indeed before he thought of his own personal safety and the need for some hiding-place. For the Major cut a conspicuous figure wherever he happened to be. He looked, in fact, precisely what he was, a soldier and a gentleman. Nor must the reader imagine for one moment that he and "Charlie", the high-placed officer of whom he had spoken, were merely spies engaged on some dangerous espionage. There is spying and spying. There is the patriot who for the sake of his country, not for mere filthy lucre or out of burning curiosity, will investigate matters of moment, such as guns and forts and equipment used by possible enemies of his country. And there are others who from the same patriotic motives will endeavour to fathom some new negotiations between Powers other than his own, some diplomatic move, some international conspiracy hatched in the secret recesses of foreign offices, perhaps never set down on paper, never signed and sealed, merely a secret compact, but still something of vital importance for his own people. We do not profess to guess what precisely was the business upon which the Major and his friend had been engaged. It was secret, it was of vital importance, and it was of the utmost delicacy. Let us, then, leave it there, merely remembering that the elusive Charlie had intimated to the Major that he had succeeded in his mission, while the authorities at home had thought so much of the matter and desired that information so greatly that they posted the Major to the great airship when on her world-wide tour, and urged Andrew and Joe Gresson to hazard a visit to Adrianople, even at the risk of wrecking a machine than which nothing would appear to be more valuable to Great Britain. It was with an inner knowledge of this delicate affair that the Major strove to discover his friend, and for the moment we will leave him hastening through the streets of the city, gazing into the faces of passers-by as the dawn drew near, and risking discovery. In fact, he merely forestalled Dick, for the young midshipman was now engaged in a similar task with similar risks, seeking eagerly for those for whom he and his friends had descended from the airship.