"Can it be?" she questioned. "Is the answer as simple as this?"
"I hope so," he told her. "It is something you wouldn't have thought of, because you did not remember all you were taught about hypnotism. And no one else could have done it against the old one's will."
"Look!" Deisanocta cried suddenly. "He has lost his way."
"Impossible," Barry said.
But the old Martian was leading them toward a blank wall. Still he did not hesitate. With steps rapid, certain, he marched directly into the wall. His head struck, and he fell, rolling to their feet.
Barry bent over him quickly, then rose one hand digging at the wall. "It's soft dirt," he explained. "Didn't hurt him. He's only stunned." He stepped back to Deisanocta.
"That's why Grey did not find whatever is here. It's somewhere behind that wall—cut off by an earth slide!"
"But—what is there?"
"We'll soon find out." Barry's hand dug at the wall, scooping away the soft dirt. "Tell the boys to start digging. But post a couple up the tunnel in both directions, so we won't be surprised."