Half a dozen wild schemes flitted through Foster's brain, only to be discarded as futile. Then suddenly he thought of something that had every chance of success if only they were given time enough. Layroh in his arrogance had forgotten that his prisoners were not naked brutes of Rikor. In the very clothing the men wore was the means of escape from the pits. * * * * * Foster's voice cut through the babel in the room until he gained everyone's attention. "Our only chance for escape is to get a rope between two pits," he said curtly. "Then one man can climb out while the other holds the rope. We'll have to make that rope from our clothing. No one man can get a strip strong enough, so we'll have to work the strips to a central man who can braid them into a single heavy rope. I'm near the center. Get the strips to me. Tear your clothing into ribbons, and knot them together. Use your knives, watches, anything to weight one end of the strip. Then cast until you get contact with the pit next to you. That way all the strips can be worked to me." A period of feverish activity followed while the men went to work. Layroh also was busy. Through several narrow ventilating slits high in the cavern wall they heard the hum of machinery. The first of the men finished knotting their ropes together. With weighted ends muffled to deaden their fall upon the rock floor, they began casting to get contact with their neighbors. Success came slowly. There were often scores of blind casts made before a weighted end came into an adjoining pit. But the time finally came when Foster had a twenty-five-foot length of rope strong enough to bear his weight. He already had a single strand making contact with Garrigan in the next pit. Garrigan drew the heavier rope in to him, then acted as an anchor while Foster climbed to the floor above. * * * * * His downstretched hand pulled Garrigan to freedom. Getting the other men up to the floor was the work of but a few moments. They were a weird-looking crew in the torn fragments of clothing that remained to them. Foster stationed them beside the locked cavern door so that they would be hidden behind it when it opened. "Wait till Layroh is safely inside," he ordered, "then rush him. Get that black ray thing out of commission first. Without that, we should be more than a match for him. In the meantime you come with me, Garrigan. Maybe we can get a look into the cavern." By climbing on Garrigan's broad shoulders Foster found that he had a clear view through one of the narrow ventilating slits. Layroh had made efficient use of the time since he had left the pit room. Suspended from softly glowing wires in the large central glass case was a circular group of ten of the Shining Ones.