In the ensuing silence, Julian's mind trained to the apex of its wide-awakedness, felt the horror-vibration that swept the audience of Dekkans. He saw the coruscating streamers of living fire that blazed from the stupendous double star, and, with a feeling of shock saw that ahead of him an Astro-operative's mask had slid imperceptibly to one side, enough to expose a tell-tale _silver tide that had reached half-an-inch above the hair-roots_! Casually almost, Julian moved with his strange, smooth elegance over the ethereal blueness of the safiro-plast flooring, and the imperturbable gaze of his frigid eyes probed into the suddenly startled glare of the man. Without warning his hand flashed out and came away with the torn mask. A wealth of hair that had been tinted gold but showed unmistakable silver at the roots and parting cascaded to his shoulders. The narrow face of the Mutant, with its thin, high-bridged nose and silver eyes, flushed crimson as he was exposed, and the long claw-like hand darted to his side, groping for the deadly Power-rapier that was _de rigeur_. All in one sinuous motion he lunged with the weapon that described a silver vortex under the fulgurant star. In the utter silence Julian, too, had drawn. The breath of all present seemed to pause for a startled second, then their ranks split to give them room. There could be no interference in a duel, that was the law. There was courage in the Mutant, a fanatical valor that was mirrored in his eyes. He knew his life to be forfeit--and he intended to sell it as dearly as he possibly could. * * * * * Only the singing impact of the blades was heard, as the darting swords parried and cut, swirling streamers of unleashed power. And suddenly, the Mutant seemed to recoil upon himself, as if gathering all his reserves of strength, then he launched himself forward in a vertiginous fury of unholy speed. And that was his undoing, for Julian trained under Jovian gravity could more than match it, and the Mutant staking all on speed, had had to sacrifice his guard. There was a soundless flash, like the glare from a gigantic glass, and where the Mutant's chest had been there was only space, space lit by the spectral-blueness of the Dekka Star. The body fell a charred and twisted thing from which the watchers averted their eyes. The peculiar odor of disintegrated flesh stung their nostrils. For the first time in living memory, a spy had contrived to enter their midst. Julian didn't care to think what would happen to the units who guarded and activated the Neuro-graphs that were posted the length of the entrance corridor. Still, it was obvious that only a mind of great power could have had the satanic ingenuity to plan an invasion of the _Dekka's_ Hall of Sessions.