The first of the Mercutians pounded heavily into the room when Hilary had thrust Grim into the secret lift. He whirled and fired. The Mercutian coughed and fell forward. Other gray warty faces, furious, thrust from behind their dying comrade. But Hilary was in the lift, pressing the button for full speed down. A darting ray showered them with rounded smoking bits of vita-crystal, but they were dropping headlong through the building.


en minutes later they emerged cautiously from the entrance to the Pullman Building. It was deserted, deathly still. The two Earthmen stopped short, horror-struck at what they saw.

The streets were shambles. Hundreds of bodies lay sprawled in tumbling twisted heaps. Earthmen all, with here and there the grotesque huge bulk of a Mercutian who had failed to hear the warning signal. The bodies were scorched, blackened. Raw agony appeared on contorted desperate faces. It was not good to look upon.

"Wh—what has happened?" Grim gasped, his breath coming heavily.

"Just a little pleasantry of the Mercutians," Hilary said bitterly. He looked upward. High overhead hovered a gigantic shape, motionless.

Its great disk, burnished and dazzling in the cloudless sky, seemed to cast a sinister shadow over the city it had destroyed a second time.

"There's the toy that did it," said Hilary. "I felt the heat while I was a captive up in the Robbins Building. You must have flown over after, and missed it."

Grim shook a great brawny fist aloft. His deceptively mild eyes were hard flames now. His face was set in great strong ridges. Hilary had never seen him this way before.