Using signs, he asked her how the male had gotten into the room despite the gate across the tunnel. She indicated that the gate was ordinarily closed only when the dekapeds were awake or when her companions and she were sleeping. But it had been the turn of one of their number to collect eggs in the queen's chamber. As she reconstructed it, the rogue had appeared at that time and killed the scientist there. Then, after ravening among the still-sleeping colony, it had gone down the tube and there had seen the light shining from the open tunnel. The rest of the story he knew.

Why, he pantomimed, why didn't the escaped male sleep when all his fellows did? The one in the cage evidently slept at the same time as his companions. And the queen's guards also slept in the belief they were safe from attack.

Not so, replied Martia. A male who had gotten out of a cage knew no law but fatigue. When he had exhausted himself in his eating and killing, he lay down to sleep. But it did not matter if it was the regular time for it or not. When he was rested, he raged through the tubes and did not stop until he was again too tired to move.

So then, thought Lane, that explains the area of dead umbrella plans on top of the tube by the garden. Another colony moved into the devastated area, built the garden on the outside, and planted the young umbrellas.

He wondered why neither he nor the others of his group had seen the dekapeds outside during their six days on Mars. There must be at least one pressure chamber and outlet for each colony, and there should be at least fifteen colonies in the tubes between this point and that near his base. Perhaps the answer was that the leaf-croppers only ventured out occasionally. Now that he remembered it, neither he nor anyone else had noticed any holes on the leaves. That meant that the trees must have been cropped some time ago and were now ready for another harvesting. If the expedition had only waited several days before sending out men in tracs, it might have seen the dekapeds and investigated. And the story would have been different.

There were other questions he had for her. What about the vessel that was to take them to Ganymede? Was there one hidden on the outside, or was one to be sent to pick them up? If one was to be sent, how would the Ganymedan base be contacted? Radio? Or some -- to him -- inconceivable method?

The blue globes! he thought. Could they be means of transmitting messages?

He did not know or think further about them because fatigue overwhelmed him, and he fell asleep. His last memory was that of Martia leaning over him and smiling at him.

When he awoke reluctantly, his muscles ached, and his mouth was as dry as the Martian desert. He rose in time to see Martia drop out of the tunnel, a bucket of eggs in her hand. Seeing this, he groaned. That meant she had gone into the nursery again, and that he had slept the clock around.

He stumbled up and into the shower cubicle. Coming out much refreshed, he found breakfast hot on the table. Martia conducted the communion rite, and then they ate. He missed his coffee. The hot soup was good but did not make a satisfactory substitute. There was a bowl of mixed cereal and fruit, both of which came out of a can. It must have had a high energy content, for it made him wide awake.

Afterward, he did some setting-up exercises while she did the dishes. Though he kept his body busy, he was thinking of things unconnected with what he was doing. What was to be his next move?

His duty demanded that he return to the base and report. What news he would send to the orbital ship! The story would flash from the ship back to Earth. The whole planet would be in an uproar.

There was one objection to his plan to take Martia back with him.

She would not want to go.

Halfway in a deep knee bend, he stopped. What a fool he was! He had been too tired and confused to see it. But if she had revealed that the base of her people was on Ganymede, she did not expect him to take the information back to his transmitter. It would be foolish on her part to tell him unless she were absolutely certain that he would be able to communicate with no one.

That must mean that a vessel was on its way and would arrive soon. And it would not only take her but him. If he was to be killed, he would be dead now.

Lane had not been chosen to be a member of the first Mars expedition because he lacked decision. Five minutes later, he had made up his mind. His duty was clear. Therefore, he would carry it out, even if it violated his personal feelings toward Martia and caused her injury.

First, he'd bind her. Then he would pack up their two pressure suits, the books, and any tools small enough to carry so they might later be examined on Earth. He would make her march ahead of him through the tube until they came to the point opposite his base. There they would don their suits and go out to the dome. And as soon as possible the two would rise on the rocket to the orbital ship. This step was the most hazardous, for it was extremely difficult for one man to pilot the rocket. Theoretically, it could be done. It had to be done. Lane tightened his jaw and forced his muscles to quit quivering. The thought of violating Martia's hospitality upset him. Still, she had treated him so well for a purpose not altogether altruistic. For all he knew, she was plotting against him.

There was a rope in one of the cabinets, the same flexible rope with which she had pulled him from the mire. He opened the door of the cabinet and removed it. Martia stood in the middle of the room and watched him while she stroked the head of the blue-eyed worm coiled about her shoulders. He hoped she would stay there until he got close. Obviously, she carried no weapon on her nor indeed anything except the pet. Since she had removed her suit, she had worn nothing.

Seeing him approaching her, she spoke to him in an alarmed tone. It didn't take much sensitivity to know that she was asking him what he intended to do with the rope. He tried to smile reassuringly at her and failed. This was making him sick.

A moment later, he was violently sick. Martia had spoken loudly one word, and it was as if it had struck him in the pit of his stomach. Nausea gripped him, his mouth began salivating, and it was only by dropping the rope and running into the shower that he avoided making a mess on the floor.

Ten minutes later, he felt thoroughly cleaned out. But when he tried to walk to the bed, his legs threatened to give way. Martia had to support him.

Inwardly, he cursed. To have a sudden reaction to the strange food at such a crucial moment! Luck was not on his side.

That is, if it was chance. There had been something so strange and forceful about the manner in which she pronounced that word. Was it possible that she had set up in him -- hypnotically or otherwise -- a reflex to that word? It would, under the conditions, be a weapon more powerful than a gun.

He wasn't sure, but it did seem strange that his body had accepted the alien food until that moment. Hypnotism did not really seem to be the answer. How could it be so easily used on him since he did not know more than twenty words of her language?

Language? Words? They weren't necessary. If she had given him a hypnotic drug in his food, and then had awakened him during his sleep, she could have dramatized how he was to react if she wanted him to do so. She could have given him the key word, then have allowed him to go to sleep again.

He knew enough hypnotism to know that that was possible. Whether his suspicions were true or not, it was a fact that he had laid flat on his back. However, the day was not wasted. He learned twenty more words, and she drew many more sketches for him. He found out that when he had jumped into the mire of the garden he had literally fallen into the soup. The substance in which the young umbrella trees had been planted was a zoogloea, a glutinous mass of one-celled vegetables and somewhat larger anaerobic animal life that fed on the vegetables. The heat from the jam-packed water-swollen bodies kept the garden soil warm and prevented the tender plants from freezing even during the forty degrees below zero Fahrenheit of the midsummer nights.