“I don’t like this,” said Henney, nervously. “Neale surely ought to have found a ledge or bench or slope by now.”

Instinctively the soldiers held back, reluctantly yielding inches where before they had slacked away feet. But intent as was their gaze, it could not rival that of the cowboy.

“Hold!” he yelled, suddenly pointing to where the strained rope curved over the edge of the wall.

The troopers held hard. The rope ceased to pay out. The strain seemed to increase. Larry King pointed with a lean hand.

“It’s a-goin’ to break!”

His voice, hoarse and swift, checked the forward movement of the engineers. He plunged to his knees before the rope and reached clutchingly, as if he wanted to grasp it, yet dared not.

“Ropes was my job! Old an’ rotten! It’s breakin’!”

Even as he spoke the rope snapped. The troopers, thrown off their balance, fell backward. Baxter groaned; Boone and Henney cried out in horror; General Lodge stood aghast, dazed. Then they all froze rigid in the position of intense listening.

A dull sound puffed up from the gorge, a low crash, then a slow-rising roar and rattle of sliding earth and rock. It diminished and ceased with the hollow cracking of stone against stone.

Casey broke the silence among the listening men with a curse. Larry Red King rose from his knees, holding the end of the snapped rope, which he threw from him with passionate violence. Then with action just as violent he unbuckled his belt and pulled it tighter and buckled it again. His eyes were blazing with blue lightning; they seemed to accuse the agitated engineers of deliberate murder. But he turned away without speaking and hurried along the edge of the gorge, evidently searching for a place to go down.