Then the two men turned and looked at one another. "Where is Lieutenant Bradley?" asked Sinclair. They walked to the fire. Only a few smoking embers remained. A few feet away lay Bradley's rifle. There was no evidence of a struggle. The two men circled about the camp twice and on the last lap Brady stooped and picked up an object which had lain about ten yards beyond the fire--it was Bradley's cap. Again the two looked questioningly at one another, and then, simultaneously, both pairs of eyes swung upward and searched the sky. A moment later Brady was examining the ground about the spot where Bradley's cap had lain. It was one of those little barren, sandy stretches that they had found only upon this stony plateau. Brady's own footsteps showed as plainly as black ink upon white paper; but his was the only foot that had marred the smooth, windswept surface--there was no sign that Bradley had crossed the spot upon the surface of the ground, and yet his cap lay well toward the center of it. Breakfastless and with shaken nerves the two survivors plunged madly into the long day's march. Both were strong, courageous, resourceful men; but each had reached the limit of human nerve endurance and each felt that he would rather die than spend another night in the hideous open of that frightful land. Vivid in the mind of each was a picture of Bradley's end, for though neither had witnessed the tragedy, both could imagine almost precisely what had occurred. They did not discuss it--they did not even mention it--yet all day long the thing was uppermost in the mind of each and mingled with it a similar picture with himself as victim should they fail to make Fort Dinosaur before dark. And so they plunged forward at reckless speed, their clothes, their hands, their faces torn by the retarding underbrush that reached forth to hinder them. Again and again they fell; but be it to their credit that the one always waited and helped the other and that into the mind of neither entered the thought or the temptation to desert his companion--they would reach the fort together if both survived, or neither would reach it. They encountered the usual number of savage beasts and reptiles; but they met them with a courageous recklessness born of desperation, and by virtue of the very madness of the chances they took, they came through unscathed and with the minimum of delay. Shortly after noon they reached the end of the plateau. Before them was a drop of two hundred feet to the valley beneath. To the left, in the distance, they could see the waters of the great inland sea that covers a considerable portion of the area of the crater island of Caprona and at a little lesser distance to the south of the cliffs they saw a thin spiral of smoke arising above the tree-tops.