They slipped from the doorway and nearly fell, avoiding a mass of jelly the size of a two-story house which flopped against the entrance. They edged by its pulsing, transparent sides. The lamp light pierced into it a yard, and once a skull swirled toward the surface and then sank again.

Suddenly it sucked away from the entrance and shivered ponderously toward them. Something was happening at the front. Figures, three or four of them, were detaching themselves from the mother mass and preceding it.

They turned and ran along the road, plunging suddenly into an extended darkened section. A moment later there was a glow in front of them and suddenly Urson yelled, "Watch it!"

Abruptly the road sheered off in front of them; they halted, and then approached the edge slowly. The surface of the road tore away and the girders descended, webbing toward the ruined stump of a building from which the orange-white glow rose. The glow came from the heart of the edifice. "What do you think it is?" asked Geo.

"I don't know," said Iimmi.

They looked, and in the shadow, numberless figures were marching after them. Suddenly the figures fell to the ground, and flesh rolled forward from bone, congealed, and rose quiveringly into the edge of the light.

Iimmi started out first on the skeletal, twisted structure that descended to the glowing pit. "You're crazy," Geo said. The thing flopped forward another yard with a sick sound. "Hurry up," Geo added. With Urson in the middle, they started out along the twenty-inch wide girder. Lit from beneath, their bodies were in the shadow of the girder. Only their outstretched arms burned in the pale orange light as they balanced themselves.

Before them, faintly legible on the broken building into which they were descending was the sign: ATOMIC ENERGY FOR THE BETTERMENT OF MAN

It was flanked by two purple trefoils. The beam twisted sideways, and then dropped. Iimmi made the turn, dropped to his knees and hands, and then started to let himself down the four feet to the next small section of concrete. Once he saw something, let out a low whistle, but continued to lower himself to the straightened girder. Urson made the turn next, while Geo knelt in front of him. When Urson saw what Iimmi had seen, his hand shot to Geo's chest and grabbed the jewel. Geo took his wrist. "That won't help us now," he said.

Urson expelled a breath, and then continued down, slowly. Quickly Geo turned to drop now.