It was impregnable, Tantril was fond of boasting. Situated on the brink of the Great Briney, its other three sides were flanked by thick, swampy jungle, in which the isuan grew and was gathered by Tantril's Venusian workers. Ranch? More a fort than a ranch, with its electrified, steel-spiked fence; its three watch-towers, lookouts always posted there against the threat of hijackers or enemies; its powerful ray-batteries and miscellany of smaller weapons. A less vulnerable place for the keeping of Eliot Leithgow's papers could hardly have been found in all the frontiers of the solar system. He, Carse, had raided it in a modern fighting space-ship, and failed. Now, with nothing but a space-suit and a ray-gun, he had to raid it again--and succeed! * * * * * The adventurer did not leave immediately. He thought it wise to make what preparations he could. His important weapon was the space-suit; therefore, he took it off and studied and inspected its several intricate mechanisms as well as he could in the carefully guarded light of his flash. It was motivated, he saw, by dual sets of gravity-plates, in separate space-tight compartments. One set was located in the extremely thick soles of the heavy boots; the other rested on the top of the helmet. He saw why this was. The gravity-plates for repulsion were those in the helmet; for attraction, those in the boot-soles. This kept the wearer of the suit always in an upright, head-up position. The logical plan of attack had grown in Carse's mind: down and up! Down to the papers, then up and away before the men on the ranch knew what was happening: he could suppose that they, like all others on the satellite, had no knowledge of a self-propulsive space-suit. The success of his raid depended entirely on keeping the two gravity mechanisms intact. If they were destroyed, or failed to function, he would be locked to the ground in a prison of metal and fabric: clamped down, literally, by a terrific dead weight! The suit was extremely heavy, particularly the boots, and Carse learned that the wearer was able to walk in it only because a portion of the helmet's repulsive force was continually working to approximate a normal body gravity. A chance to succeed--if the two vital points were kept intact! If they failed, he would have to slip out of the imprisoning suit and use his quick wits and deadly ray-gun in clearing a path to Ban Wilson, his nearest friend, whose ranch, fourteen miles from Tantril's stronghold, was where Eliot Leithgow and Friday would be awaiting him. It was characteristic of Hawk Carse that he never even considered calling on Wilson's resources of men and weapons to help him. A Hawk he was: wiry, fierce-clawed, bold against odds and danger, most capable and deadly when striking alone.... * * * * *