The sentries stared curiously at the Earth-men in their bulky space suits, but the fact that the newcomers were with Diana Staunton seemed to be sufficient passport. They began to pass a greater number of people in the corridors, and finally they stepped through a heavily guarded gate and came to a vast cavern.
The place was huge, extending for a good mile ahead of them and with a lofty roof lost in the shadows overhead. Some of the gigantic columns that supported the roof were made of heavy stone blocks. Others were natural rock that had been smoothed and polished. All over the floor of the cavern were narrow streets, and small cottages built of some queer composition that came in a rainbow of different colors, and little patches of some sort of green grass. A golden and rather misty light pervaded the whole cavern. Square shafts of a brighter radiance darted down from above at irregular intervals, and wherever one of them struck the floor of the cavern there was a small patch of cultivated ground with long-leafed plants.
"Agriculture by chemical control!" Ripon whispered in Larry's ear. Diana glanced back at them over her shoulder.
"This is Chotan, largest of the Lost Caverns," she said. "The Council of Elders is now in session, and it will be best that we go direct to them."
"Why do you call these the Lost Caverns?" Larry asked.
"Because we who live here are outlaws, and the location of these vast caves is not known to the Lords of Gral-Thala who rule the other side of the Moon."
"Apparently not all the inhabitants of the Moon are so friendly," Ripon said.
"If you came into the hands of the Lords of Gral-Thala," she said grimly, "they would tear the skin from your bodies and use it to lace their scented golden boots!"
Large-eyed Lunarians stared curiously at the Earth-men as they hurried through the streets of the underground village. Diana led them direct to a broad-beamed, red-roofed building that stood by itself in the center of the cavern. A dozen elderly men sat behind a long table of carved wood that was black and cracked with age. It was, Larry realized, the first wooden thing he had seen since he landed on the Moon. At either side of the chamber stood a squad of armored warriors.
Larry was staring at a curious device that was carved in the center of the table, and carried on a banner hung above the heads of the council, and inlaid in a white metal on the bluish steel shields of the guards. And then he recognized it! It was the crescent Earth, the profile of the mother planet as seen from the Moon when the Americas were still in sunlight and the shadows of night were creeping across the Atlantic. The sight of it made him home-sick. The crescent moon had been a religious symbol to many of the ancient races of Earth, and it was fitting that the crescent earth should hold a similar place on this isolated satellite.