"I had heard reports that a great many of my colleagues escaped and formed a rebel organization that carried on the work secretly and illegally, but I was never able to learn details of it until you came and told me of the activities in which you have been engaged. You see, I haven't been out of these caves in a quarter of a century."
Shadow appeared at the recess to report to them that the Toughs had passed on. How he did it, Dark was unable to determine surely, for he could hear no words spoken. Either Shadow communicated by subtle gestures or by tones beyond Dark's powers of hearing, but both Old Beard and Happy seemed to understand him readily.
"How do you happen to be here, Old Beard?" asked Dark as they left the recess and resumed their progress down the walkways.
"I was captured when the government broke up the experimental groups," answered Old Beard. "I was the leader of the section of the experiments dealing with extrasensory perception, and, instead of executing me at once, they tried to persuade me to continue this work for the government along specific lines and under supervision. I refused, because I knew that anything I helped them develop would not be used for the benefit of the Martian colonists, but for greater profits for the spacelines.
"At last I was able to escape into these underground caverns where they grow food plants hydroponically and sell them to supplement the produce of the dome farms and the gardens in the dome cities. These caverns are extensive and, with the friendship and help of the Jellies, I've evaded discovery for twenty-five years."
"Just who and what are the Jellies?" asked Dark. "I haven't been able to get a very satisfactory answer to that question from Happy."
"They're human experimental animals," answered Old Beard. "The terrestrial food plants grown hydroponically and sold in the dome cities actually are a supplemental sideline to the real purpose of this place. Marscorp is conducting its own experiments here, with a crew of expert geneticists.
"What Marscorp is trying to do is to breed native Martian plants, that will grow in the open lowlands without expensive oxygenation and irrigation, that are not poisonous to humans and can be used for food. At the same time, they're approaching the problem from the other side, and the Jellies are men and women whose glandular structure has been altered in an effort to make their physiology more receptive to native Martian vegetation. If they succeed, of course, Marscorp has just as complete a monopoly over such a food supply as it does over imports from Earth, but at considerably less expense."
"And the Toughs?"
"They're human experimental animals, too, based on a different type of glandular alteration. They're neither as docile nor as intelligent as the Jellies, so they can't be used for slave labour as the Jellies can. About the only way they're ever used is as occasional goon squads to terrorize the Jellies and keep them in line."