There could be no doubt of it. Doggo’s plane was gone, and with it had vanished all hopes of a speedy return to Cupia. Sadly the two returned to camp, and gave directions to start back to Vairkingi. But Myles Cabot was not a man to despair or he would have yielded to fate many times in the past during his radio adventures on the silver planet. Already, as the porters were loading the carts, his agile mind was busy seeking some way whereby to snatch victory from defeat. So when the expedition was ready to start he led it around the woods until he picked up the trail of the stolen airship. Quite evidently the theft had not been made by ant-men, for they would have _flown_ the machine away, upon clearing the woods. No, it had obviously been taken by either Roies or Vairkings, who had wheeled or dragged it away. If he and Doggo could follow its path, they might yet be able to locate and recover the stolen property. The trail led north until it struck, at right angles, a broad and much-rutted road which ran from Vairkingi to the northeast territory of the Vairkings. And at this point the trail completely vanished. Myles held a written conference with Doggo, at which it was decided to return at once to the city and make inquiries there as to the stolen plane. If no one there knew of it, Doggo was to be dispatched on a new expedition into the northeast territory, and in the meantime Cabot was to rush the completion of his radio set. So they turned to the left and took up the march to Vairkingi. It was a tired and disgusted human who returned that evening to the quarters which he had never expected to set eyes on again. Myles Cabot gave himself up to a few moments of unrestrained grief. As he sat thus a soft, sympathetic voice said: “Didn’t you succeed in finding that which you sought? I am so sorry! At least you came back safely to me.” But the blandishments of little Quivven, his pal, failed to comfort him. That evening when Jud returned from the brickyard, Myles sought an audience with him and demanded news of the plane. Said Myles: “This beast friend of mine came near here in a magic wagon which travels through the air. Possession of this magic wagon would mean much to Vairkingi in your wars, and especially if the beasts ever take it into their heads to attack you, as they undoubtedly will do sooner or later. “Yesterday Doggo and I embarked on a secret expedition to bring this magic wagon as a surprise to you and Theoph. But we find that it has been stolen. We have traced it to the northeast road, and there the trail ends. It must be either in this city or in the northeast territory. Will you help me to find it?”