The slope of the upward-leading tunnels had become less noticeable, from which fact the two men reasoned hopefully that they were near ground level. And now they began to see termite workers bearing a new sort of burden: termite eggs, sickly looking lumps that had only too obviously been newly laid. A file of workers approached. In a long line, each with an egg, looking for all the world like a file of human porters bearing the equipment of a jungle expedition. Slowly, the things moved--carefully--bound for some such vast incubator as the one Jim and Dennis had stumbled into some hours before. "We want to go in the opposite direction from them," Denny whispered. "They're coming from the Queen termite's den--and we don't want to blunder in there!" They about-faced, and moved with the workers till they came to the nearest passage branching away from the avenue on which the file marched. Denny dabbed at his forehead. "Lucky those things came in time to warn us," he said. "From what little science knows of the termites, I can guess that the Queen's chamber would be a chamber of horrors for us!" They walked on, searching for another main avenue, such as the one they had left; which might be an artery leading to the outside world. But they had not gone far when they were again forced to change their course. Ahead of them, marching in regular formation, came a band of soldiers larger than the usual squad. They filled the tunnel so compactly that the two men did not dare try to squeeze past them. "Here," whispered Jim, pointing to a side tunnel. * * * * * They stole down it; but in a moment it developed that their choice had been an unlucky one: the crash of the heavy, armored bodies continued to follow them. The soldiers had turned down that tunnel, too. "Are they after us again?" whispered Jim. Denny shrugged. There was still a remnant of the disguising termite-paste on their bodies to fool the insects. It seemed impossible that the ruling brain behind them had survived the cannibalistic rush and taken command of the mound again? But--was anything impossible in this world of terror? Steadily the two were forced to retreat before the measured advance of the guards. And now the tunnel they were in broadened--and abruptly ended in another of the vast chambers that seemed to dot the mound city at fairly regular intervals. But this one appeared to be humming with activity, if the noise coming from within it was any indication. The two passed at the threshold, dismayed at the evidence of super-activity in the chamber ahead of them. But while they paused there, the soldiers behind them rounded a corner. They could not go back. There were no more of the opportune side entrances to dodge into. All they could do was retreat still farther--into the vast room before them.