annoying insect. But from a curiously-shapen tube in the insect's claw leaped a lancet of flame. A gout of red agony that scorched and blistered his palm. The giant howled and pulled his hand away. Grossman smiled. Good! Who holds an adversary in fear of pain possesses a slave. Now, if only the creature were telepathic—"You!" he thought, his thought directed and intensified by the menavisal unit in his helmet, "have you intelligence? Can you understand me?" The giant's answer came back sluggishly. "I can ... understand." "That is well. Then listen to me, and mark well my words. I am Master here. Do you acknowledge that?" The creature stirred restlessly. "Master? I accept no Master. I am Master of mine own will." Grossman pressed the grip of his Haemholtz. A flash of livid lightning seared the subterranean chamber. Grossman challenged, "You defy the Master of the fire-that-bites?" The giant cringed against the farthest wall. "Nay!" he conceded. "You are Master. I am your servant." "It is well you understand. For there is work to be done. When it is accomplished, then you will be freed. Hear now, huge one, what is expected of you...." VII "Manacles!" repeated Rocky Russell, "Manacles twenty feet in circumference! But that—that's impossible! Handcuffs for a normal six-foot man measure about six inches in circumference. Twenty foot manacles would be used on someone two hundred and forty feet tall!" "Always assuming of course," Lynn pointed out, "that these gyves are to be used on a man. Which isn't very likely. Much more possible that they were constructed for some beast ... some tremendous animal—" "True," admitted Rocky. "But even so—imagine the size of that animal! Well, that settles it. Bud, I want you to take Miss Graham back to the fort immediately." "And you?" "I'm going to follow that roller." "But there may be danger—"