t was dark when they reached the first swellings of the Ramapo Range. It was dangerous to try and make their way through tangled brush and mountain trails. All night they camped on the bare ground, sleeping fitfully, cramped cold, shivering. They dared not light a fire; it would draw instant unwelcome attention.

When dawn came, they were on the move, glad to stretch their sodden limbs. Unerringly Grim homed for the invisible cleft. Nothing stirred in the forests, even the birds seemed gone. The fog had lifted, the sun blazed forth in unclouded majesty. The damp on them dried quickly.

But Grim shook his fist at the unwitting orb.

"Damn that weather machine," he growled. "Breaking it seems to have made matters worse. Even the regular midnight shower has stopped. I'd give ten years of my life for the sight of a cloud."

"It will never rain again," Hilary said wearily. "It has forgotten how."

The bright sunny sky seemed a brazen hell to the footsore Earthmen. It mocked and jeered at them with sparkling waves of warmth.

Before them was an unbroken mass of underbrush. The next instant they were on the brink of the chasm.

"They haven't found us yet," said Morgan, surveying the looped end of the rope ladder. They climbed swiftly down the swaying rungs. The rock slanted with them, turned sharply and fell sheer. Below there was a confused murmur, the sound of movement.

A voice came floating up to them, sharp, commanding.

"Stop where you are, you two. You're covered."