Their plates again showed only the blinding whiteness of ice they knew was frozen carbon dioxide rather than frozen water or snow. For even more than on Four, there could be no water here, even in its most frozen form.

They cruised about above the surface, watching their instruments to find and record any metallic ore deposits, especially the new one. The terrain was so forbidding, so desolate, that even the irrepressible Jon felt no desire to land on it, or to go outside.

Again their mother took most of the needed photographs, while the boys recorded all the other data of geography, size and conditions generally. Finally, Jon set the ship down on a fairly level plateau close to what they figured was the equator.

"Well, here we are and that's all I care about," Jon announced with a shiver. "We'll use the distant hands to put out the marker. Then we'll see if we can find the location of that fuel deposit."

Jak agreed. "I wouldn't go out there for a million credits." He shuddered as he looked out the port while the others crowded about to view that forbidding scene. "Maybe we should, but I sure wouldn't get any fun out of it."

"Doubt if our suits would be able to keep us warm, even with the heaters at max."

"No," their mother said sharply, although they could detect the relief in her voice that they had already made the decision. "This is one time I would have set my foot down, and not allowed it. This place gives me the creeps."

While Jon was making up the tape, Jak carried a signal-sender into the lock and placed it beneath those "distant hands." Jon came in and installed the tape, then started the mechanism running.

They returned to the control room, and Jak, whistling unmelodiously between his teeth, operated the controls that opened the outer door, then used the lifting servo-mechanism to set the signal-sender outside on the icy ground. When the outer door was closed, he nodded to Jon and the latter lifted the ship again.

"I'm going up a couple of miles, then circle about to look for deposits of that fuel metal. Meanwhile, as we go we can get the rest of our dope, and then scoot out of here."