Li and Chuba were past the halfway mark and Uncle Charlie was almost there when Biff saw the swaying bridge give a sudden shudder. Biff thought for an instant that it was an earth tremor. Then he noticed that the porters near him were chatting, quite unconcerned. Biff gave a warning shout, too late.
With a snap like a rifle report, the rope parted from the stake at Biff's right. With it, the entire cable slipped on that side of the bridge, tilting the runway downward. In a single second, Charles Keene, Li, Chuba, and a pair of porters were sprawling on the slippery bamboo slats, which had suddenly become a chute to certain doom in the abyss below!
XVII
The Monster of the Mountains
In the harrowing moments that followed, Biff saw two shapes go slithering off the slanted bridge and continue spinning, tumbling in huddled helpless fashion into the gaping jaws of the roaring gorge. Biff shut his eyes as they disappeared, and his mind flashed back to those tiny figures that he had seen against the snowy background of the mountain pass.
Uncle Charlie, Li, and Chuba. The boys were two of a size, like those two forms that had just plunged from the collapsing bridge. So they must be Li and Chuba—or else the two porters. But no, not the porters; those somersaulting shapes weren't big enough. Biff tightened his fists grimly as he opened his eyes for one last hopeless look.
Biff was right: It wasn't the porters.
At the first warning quiver of the bridge, they had dropped their heavy burdens and made a desperate dive for safety. Nearly across, first one, then the other, had managed to grab the high edge of the canted runway and scramble to the ground beyond. But as Biff looked past them, his eyes opened really wide.
It wasn't Li or Chuba either!
Both boys were still there, near the center of the bridge, with Uncle
Charlie!
The moment the bridge had tilted one way and they had felt themselves sliding with it, all three had made a frantic grab in the other direction. Instinctively, they had gripped the upper side and the slender grass ropes that supported it. They were still hanging on.