out of the way spot?" asked Art. "I had to have a hideout on Earth from which I could steal out and make a few observations," the Martian explained. "And it's a good thing I did, from what I hear. I arrived here from Venus yesterday morning, about five—" "Only a few hours before we crashed!" exclaimed Elene. "Yes—the forest in this vicinity was just beginning to be attacked. I landed on the side hill above here, and blanketed this canyon with a choker ray. I didn't want to make it too noticeable—" "Wait," Art interrupted, "how about this choker ray—that's the whole thing—that's what we want to know!" "I'll get to that," rebuked Klalmar-lan. "Anyway, I saw this ship crash—but knowing it was one of Theller's, I had to be careful about offering assistance. I have been watching Miss Moor and wondering if I should have to protect her from all this vicious looking fauna which you have here in such profusion. But I didn't dare trust her until I heard her talk to you. My object was to contact some trustworthy person here on Earth. Now that I've found you, I think we'd better take off for Venus immediately. My ship is right up the hill above us. Incidentally, I have a surprise there—an old friend of yours." Mystified, the couple followed him through thick underbrush to the space ship. They entered behind him and froze in astonishment. There, lying on a bunk, white and still and swathed in bandages, was Denny! "Don't be alarmed," Klalmar-lan reassured them. "I've got him under a neural anesthetic. He's suffered a bad radium burn, but I think he'll be all right. Should recover consciousness in a couple of hours." Klalmar-lan was at the controls, and they were rising rapidly. The little spot of green was visible through the rear port, falling away behind them. "I first met Denny on Venus, where I had been sent to watch for the coming of Ghlak-Ileth, or Hell-worms, as we call them; for they are no new experience to us Martians. Some three thousand Earth years ago, they turned our once beautiful planet into a red desert, almost exterminating our race. Three thousand years before that, our astronomers had watched as uninhabited Mercury gave up its treasure. According to all our calculations, Venus should have been next. When I talked to Denny in his jungle camp, he informed me that he had discovered remains of an ancient civilization on Venus.