"I shall want to see you again soon, my friend," said the Martian cordially. "There are many things at my establishment which I would like to show you--much that we can talk about." Austin Shelby accepted the card and handed Hekki his own. Here was an opportunity to get some first hand information on the mysterious man of Mars and his more mysterious, perhaps sinister doings. The idea that he might be placing himself in a dangerous position, Shelby gave scarcely a moment's thought, for he had in him the spirit of the adventurer. "Thank you, Akar Hekalu. I shall get in touch with you. And in the meanwhile you can reach me at my address through the view-phone at almost any time for I shall be working on a new mechanism there. _Sidi yadi._" "_Sidi yadi_, my friend." The two men parted. * * * * * Fifteen minutes later a rustling whisper was audible throughout the _Ekova_, above the steady purr of the forward-pointing decelerating rockets. It became a deep-toned soughing which rapidly increased in volume to a loud roar, and then to a screeching hiss. The ship swayed and rocked a little. It was tearing its way into the terrestrial atmosphere. In the conning tower forward, the pilot and his assistant were working calmly and cooly over the bewildering array of controlling mechanisms. Getting those thousands of tons of metal safely lowered into a space ship's cradle on the landing stage, was a difficult task, but the experience and efficiency of the two men was quite competent to cope with it. Far below was a vast sea of winking lights--Chicago, its colossal skyscrapers looming up severe and white and beautiful in the glow. The pilot's nimble fingers turned a small horizontal wheel at his side. The liner dipped and dropped slowly earthward toward an area of white light. A mass of cloud poured over the huge hull for an instant and then passed by. The outer shell of the great silvery whale which had been chilled to a degree from absolute zero, by the cold of space had been warmed but slightly by the rapid passage through the atmosphere and now gleamed with jewel-like hoar frost. Down, down it floated until it was only three hundred feet above the landing stage. A red signal light gleamed suddenly on a panel within the control room, and the wizard of that eerie chamber shifted a tiny lever. The space ship halted and hung motionless supported by its repulsion plates. On the ground in the glare of floodlights white-clad men hurried about. Four mighty arms of metal groped upward from a mass of heavy framework. They clutched the craft with a grating noise, and then, with the slow deliberation of a sleepy giant, they drew it gently down into its cradle.