took a step forward and to one side. Again the creature moved to block him; and as it did, Kirk saw along one of its flanks a deep, ragged gouge, leaving a glistening, rocklike surface exposed. It was obviously a wound.
"Well, you can be hurt, can't you?" He lifted the phaser again. The creature rattled, and shrank back, but held its ground. Obviously it was afraid of the weapon, but it would not flee.
Kirk lowered the phaser, and the rattling stopped. Then he moved deliberately back against the nearest wall and dropped slowly into a squatting position, the phaser held loosely between his knees.
"All right. Your move. Or do we just sit and wait for something to happen?"
It was not a long wait. Almost at once, Spock burst into the area from the open end of the tunnel. He took in the situation instantly and his own phaser jerked up.
"Don't shoot!" Kirk shouted. Echoes went bounding away through the galleries and tunnels.
Spock looked from one to the other. As he did so, the creature moved slowly to the other side of the tunnel. Kirk guessed that he could get past it now before it could block him again. Instead, he said, "Come on over, Mr. Spock."
With the utmost caution, his highly interested eyes fastened on the creature, Spock moved to Kirk's side. He looked up at the walls in which the silicon nodules were imbedded. "Logical," he said.
"But what do they mean?"
"I'd rather not say just yet. If I could possibly get into Vulcan mind-lock with that creature—it would be easier if I could touch it . . ."
Before Kirk could even decide whether to veto this notion, Spock stepped toward the animal, his hand extended. It lurched back at once, its rattling loud and angry-sounding.
"Too bad," Spock said. "But obviously it will permit no contact. Well, then, I must do it the hard way. If you will be patient, Captain . . ."
Spock's eyes closed as he began to concentrate. The intense mental power he was summoning was almost physically visible. Kirk held his breath. The creature twitched nervously, uneasily.
Suddenly Spock's face contorted hi agony, and he screamed. "The pain! The pain!" With a great shudder, his face ashen, he began to fall; Kirk got to him just in time.
"Thank—you, Captain," Spock said, gasping and steadying himself. "I am sorry—but that is all I got. Just waves and waves of searing pain. Oh, and a name. It calls itself a Horta. It is in great agony because of the wound—but not reacting at all like a wounded animal."
Abruptly, the creature slithered forward to a smooth expanse of floor, and clung there for a moment. Then it moved away. Where it had been, etched into the floor in still smoking letters, were the words: NO KILL I. Both men stared at the sentence in astonishment.
" 'No kill I' "? Kirk said. "What's that? It could be a plea to us not to kill it—or a promise that it won't kill us."
"I don't know. It appears it learned more from me during our empathy than I did from it. But observe, Captain, that it thinks in vocables. That means it can hear, too."
"Horta!" Kirk said loudly. The creature rattled at once and then returned to silence.
"Mr. Spock, I hate to do this to you, but—it suddenly occurs to me that the Horta couldn't have destroyed that perfusion pump. It was platinum, and immune to the acid mix. It must have hidden it somewhere—and we have to get it back. You'll have to re-establish communications, no matter how painful it is."
"Certainly, Captain," Spock said promptly. "But it has no reason to give us the device—and apparently every reason to wish us off the planet."
"I'm aware of that. If we can win its confidence . . ."
Kirk took out his communicator. "Dr. McCoy. This is the Captain."
"Yes, Captain," McCoy's voice answered.
"Get your medical kit and get down here on the double. We've got a patient for you."
"Somebody injured? How?"
"I can't specify, it's beyond my competence. Just come. Twenty-third level; find us by tricorder. And hurry. Kirk out."
"I remind