"Don't be too sure of that," Jad-han advised. "If you realized the purpose of that examination, you would understand that it was never devised by any unsound mind. Did you see the dead men as you entered the valley?"

"Yes, but what have they to do with the examination?"

"They took that same examination; that is why they lie dead out there."

"I do not understand," I said. "Please explain."

"The machines to which you were connected recorded hundreds of your reflexes; and automatically recorded your own individual nerve index, which is unlike that of any other creature in the world.

"The master machine, which you did not see and never will, generates short wave vibrations which can be keyed exactly to your individual nerve index. When that is done you have such a severe paralytic stroke that you die almost instantly."

"But why all that just to destroy a few slaves?" demanded Pan Dan Chee.

"It is not for that alone," explained Jad-han. "Perhaps that was one of the initial purposes to prevent prisoners from escaping and spreading word of this beautiful valley on a dying planet. You can imagine that almost any country would wish to possess it. But it has another purpose; it keeps Doxus supreme.

"Every adult in the valley has had his nerve index recorded, and is at the mercy of his jeddak. You don't have to leave the valley to be exterminated. An enemy of the jeddak might be sitting in his own home some day, when the thing would find him out and destroy him. Doxus is the only adult in Kamtol whose index has not been recorded; and he and one other man, Myr-lo, are the only ones who know exactly where the master machine is located, or how to operate it. It is said to be very delicate and that it can be irreparably damaged in an instant—and can never be replaced."

"Why couldn't it be replaced?" asked Llana.

"The inventor of it is dead," replied Jad-han. "It is said that he hated Doxus because of the purpose to which the jeddak had put his invention and that Doxus had him assassinated through fear of him. Myr-lo, who succeeded him, has not the genius to design another such machine."

Chapter 6

That night, after Llana had fallen asleep, Jad-han, Pan Dan Chee, and I were conversing in whispers; so as not to disturb her.

"It is too bad," said Jad-han, who had been looking at the sleeping girl; "it is too bad that she is so beautiful."

"What do you mean?" asked Pan Dan Chee.

"This afternoon you asked me what your fate might be; and I told you what the possibilities might be, but those were the possibilities for you two men. For the girl-" He looked sorrowfully at Llana and shook his head; he did not need to say more.