“All right,” Feth replied, “I have it. Be sure all your own controls are neutral — they’re not cross-connected, and impulses will add algebraically. By the way, all the stuff is in the cargo compartment.”

The other torpedo with the first batch of samples had been salvaged from its lonely perch on Mercury, and Laj Drai knew that; so Feth hoped he would not notice the slight accent on the “all.” The mechanic had placed the extra radio in with the other objects, but had done so at the last moment and had had no time to tell Ken about it. He hoped the fellow knew how to operate the set.

Ken, as a matter of fact, had not realized what Feth was implying. He was much too occupied in bracing his nerves for the descent that had been so hard on them the previous time. He succeeded better on this occasion, largely because he was able to keep most of his mind on the problems that would be facing him after he was down. They were numerous enough.

He had little trouble finding the scene of the previous meeting, though Feth did not succeed in lowering him exactly over it. He was, he realized, early; the sun was barely up. All to the good. He reported his arrival to Feth to make sure, announced that he was resuming control, and went to work.

His first step was to guide the torpedo downhill to the edge of a fairly extensive patch of plant growth. Before doing anything else, he made sure that the patch was isolated; the reaction of the vegetable matter of this world to hot metal had impressed him strongly, and he had a good imagination. Then he lowered the carrier until the vivarium was touching the ground, and detached the clumsy box. The double lids opened without difficulty— Feth had allowed for the probable effect of low temperature on the metal hinges — and set to work.

The samples of earth came speedily from the cargo compartment, and were dumped into the box — all at one side. Using a strip of metal he had brought along for the purpose, Ken levelled out the dark pile into a layer some three inches deep and a foot wide along one side of the container; then he began to use the strip as a crude shovel. Tiny bushes, patches of moss, and other growths were pried out of the ground, the scientist carefully refraining from allowing his armor to contact them and laying the strip down to cool at frequent intervals. He investigated the widely varying root systems, and carefully dug an extra allowance or soil from the spot where each plant had been removed, so that there would be a sufficient depth in the box beneath it. One by one he transferred his specimens to the vivarium, placing them much too close together to have pleased a human gardener but setting them firmly into the soil so that they stood up as they had before. Once or twice he looked longingly at larger bushes, but gave up. They were too tall, and a brief investigation showed that their roots were too long.

He had covered perhaps two of the six square feet he had to fill when the Wings arrived. Roger and Edie were noticeably in advance of the rest; the two youngest would probably have been close behind them if the scene had not been so far from home. As it was, they had begun to get a little tired, and arrived at the same time as their parents.

Ken did not hear them coming; the microphone in the torpedo was not as sensitive as it might have been, and this time Roger did not call as soon as he saw the scientist. Instead, the children came as close as they dared, trying to see what he was up to. That proved obvious enough, but it was only after his curiosity was satisfied on that point that Roger gave an audible greeting.

“I see you’re here early.”

“Why didn’t you tell me they were coming?” snapped the voice of Laj Drai from the speaker.