A night in the Jovian Chamber, was to be emperor for one night. Every dream of a man's desire was marvelously induced through the skilful use of hypnotics; the rarest viands and most delectable drinks appeared as if by magic; the unearthly peace of an Olympus descended on a man's soul, and beauty ... beauty such as men dreamed of was a warm reality under the ineffable illumination of the Chamber. It cost a young fortune. But to pleasure mad, boom-ridden Venus, a fortune was a bagatelle. Only it had cost Dennis Brooke far more than a sheaf of credits--it had cost him the severe rebuff of the I.S.P., and most of his heart in Marla. Dennis sighed, he tilted his red, curly head and drank deeply of the insidious _Verbena_, fragrant as a mint garden, in the tall frosty glass of Martian _Bacca-glas_, and as he did so, his brilliant hazel eyes found themselves gazing into the unwinking, violet stare of a young Martian at the next table. There was a smouldering hatred in those eyes, and something else ... envy, perhaps, or was it jealousy? Dennis couldn't tell. But his senses became instantly alert. Danger brought a faint vibration which his superbly trained faculties could instantly denote. His steady, bronzed hand lowered the drink, and his eyes narrowed slightly. Absorbed in trying to puzzle the sudden enmity of this Martian stranger, he was unaware of the Mercurian Dancer. The latter had edged closer, whirling in prismatic flashes from the myriad semi-precious stones that studded her brief gauze skirt. And now, in a final bid for the spacer's favor she flung herself in his lap and tilted back invitingly. Some of the guests laughed, others stared in plain envy at the handsome, red-haired spacer, but from the table across, came the tinkling sound of a fragile glass being crushed in a powerful hand, and a muffled Martian curse. Without warning, the Martian was on his feet with the speed of an Hellacorium, the table went crashing to one side as he leaped with deadly intent on the sprawled figure of Dennis Brooke. A high-pitched scream brought instant silence as a Terran girl cried out. Then the Martian's hand reached out hungrily. But Dennis was not there. * * * * * Leaping to one side, impervious to the fall of the dancer, he avoided the murderous rush of the Martian youth, then he wheeled swiftly and planted a sledge-hammer blow in that most vulnerable spot of all Martians, the spot just below their narrow, wasp-like waist, and as the Martian half-doubled over, he lefted him with a short jab to the chin that staggered and all but dropped him.