The party swept on and was soon lost to view.
“Fooled for the time being, anyway,” said Captain Sturdy, as he rose. “Now it’s up to us to act quickly.”
The Americans and Phalos worked their way along among the boulders, gazing eagerly in all directions for their landmark.
Suddenly Don gave a shout.
“There it is,” he cried, pointing straight ahead of him. “I see it. The rock!”
The other members of the party looked in the direction of Don’s pointing finger.
There, sure enough, loomed up a curious combination of two rocks, both of large size, the upper one shaped something like a pyramid, and the lower one, on which it rested, flat and a rough square in shape.
Don had been in the rear of the party with Teddy, but it was his sharp sight that marked the goal.
There was a shout of jubilation from all the members of the group, and they hastened as fast as the difficult ground would let them in the direction of the rock.
Don was behind, but was hurrying after the others and rapidly overtaking them when suddenly the ground seemed to give way beneath him. He had a sensation of falling—down—down.