“Oh, I can’t, can’t hold it!” Mary exclaimed, and then Dora realized that the younger girl had been trying to hold Jerry’s weight.

“Don’t!” she ejaculated. “The rock can hold him. Just keep your hands lightly on the knot and pull only if the rope starts slipping.”

It seemed but a few moments before the girls heard, as from far below, a reassuring call, “All’s well!”

At once Dora let go her hold on the rope and dropped face downward as the boys had done. Mary was not to be left behind. Cautiously, they wormed their way to the edge of the cliff and peered over, being careful to keep hidden. Only their hair and eyes were over the edge, and the boys, intent on examining the skeleton stage coach, did not once glance up.

“Oh-oo!” Mary shuddered. “That black crevice looks as though it went down into the mountain a mile or more.”

“Maybe it does!” Dora whispered. “Jerry said that it’s more than a mile from here to the floor of the desert. The crack in the mountain may go all the way down.”

“Oh, I do wish the boys wouldn’t go so close to the edge of it!” Mary whispered frantically. “Dora Bellman, if Dick or Jerry slipped into that awful place—”

Dora’s interrupting voice was impatient. “Please don’t start imagining terrible things. Those boys value their own lives as much as we possibly can. Look! See how very cautiously they’re taking hold of the driver’s seat and testing its strength. Blue Moons!” It was Dora’s turn to be horrified. “Jerry is lifting Dick. My, aren’t his arms powerful? Now Dick is resting his left hand on the top of the seat and pulling on that box with his right.”

Mary clutched Dora’s arms, but neither spoke a word as they watched the movements of the boys with startled, staring eyes.

“It’s coming slowly.” Dora’s voice was tense. “Hark! Didn’t you hear a creak as though something about the stage had snapped suddenly?”