And thus it followed that while Joe, with the Major and Colonel and the derelict Frenchman on board, were coasting towards England, having once demonstrated to our friends the security of the biplane, the aerials aboard that wonderful machine clicked, while the receiver told out its message. An hour later, perhaps, while Carl Reitberg was snoring in his luxurious chair, the telephone summoned him from slumber. "Be ready to start to-morrow morning early. Joe Gresson will call for you. Warm welcome awaits you aboard the great airship." Carl simpered. His pig-like eyes lit up wonderfully, and for one brief moment he wore the appearance he had borne when Joe first met him aboard the Hamburg-Amerika liner. He was positively genial, and any old lady of a credulous disposition happening to observe him at that moment would have set him down definitely as a most engaging, kind-hearted, and simple gentleman. And so he could have been, had he not at heart been a scheming rascal. For Carl Reitberg was that. If he had been a patriot, if he had belonged to some other country than England, and for her sake had decided to destroy the airship with her crew, we would have recorded the fact plainly. But Carl had no country, not even that of England, which had fostered him, protected him, even innocently aided him in some of his rascally schemes. His scheme was merely for personal objects, to save his pocket, to win a challenge, to defeat Andrew Provost and Joe Gresson, and all the while appear in the public eye as a sportsman, something understood by the people and sure to make him wonderfully popular. The hours that followed were busy ones indeed for Carl, and Adolf Fruhmann aided him wonderfully in spite of a damaged arm. They retreated to a garret in a street off Soho, where they remained till day was almost dawning. Nor did they present themselves at the place as Carl Reitberg and Adolf Fruhmann respectively. No; they went disguised, using false names also. What passed in that garret we need not enquire into; but this is certain: when the two rogues finally left and drove away in a taxi, there was a suspicious square box beside them. "Gently, gently! You carry it," suggested Carl, as they stepped out of the cab and walked away. "Very well; I'm not afraid if you are. The things are safe till you begin to tamper with them. Then----" Adolf raised his eyes expressively and sniggered. "Then there's an end to you and--and the airship," he giggled. "H-hush, man! Are you a fool? Here! Step into this cab. We can drive straight home now, I think."