In spite of the rather strenuous day just finished, the entire family was up early the next morning. As a “special favor” to his younger brother, Donald volunteered to take the surplus horses back to town — they kept only a few at the summer house, as fodder was a little difficult to obtain. That left the younger boy free, once the shutters were removed from the upstairs windows, to get out on the mapping job, as far as his own work was concerned. Edith was delayed for a while dusting off china and washing cooking utensils — they had cleaned only enough for a sketchy meal the night before — but Roger conquered any slight distaste he might have had for women’s work and helped out. The sun was not yet very high when they emerged onto the porch, consulted briefly, and started uphill around the house.
The boy carried a small Scout compass and a steel tape which had turned up in the basement workshop; his sister had a paper-covered notebook, a school relic still possessed of a few blank pages. Between his father’s teaching and a year in a Scout troop, Roger was sure he could produce a readable map of the stipulated area with no further equipment. He had not considered at all carefully the problem of contours.
High as the Wing house was located, there was still a long climb above it; and both youngsters were quite willing to rest by the time they reached the top. They were willing, too, to sit and look at the view around them, though neither was a stranger to it.
The peaks of the Cabinets extended in all directions except the West. The elevation on which they were located was not high enough to permit them to see very far; but bits of Pend’ Oreille were visible to the southwest and the easily recognized tip of Snowshoe Peak rose between east and south. Strictly speaking, there was no definite timber line; but most of the peaks managed to thrust bare rock through the soil for at least a few hundred feet. The lower slopes were covered with forest, principally the Douglas fir which is so prevalent in the Pacific Northwest. One or two relatively clear areas, relics of forest fires of the last few years, were visible from the children’s point of vantage.
There were a number of points visible within the distance specified by Mr. Wing which looked as though they might serve as reference stations, and presently Roger took out the compass and began taking bearings on as many of these as he could. Edith was already making a free-hand sketch map of their surroundings, and the bearings were entered on this. Distances would come later; Roger knew neither his own altitude nor those of the points he was measuring, and could not have used the information had he possessed it. He knew no trigonometry and had no means of measuring angles of depression.
Details began to crowd the rough chart even before they left the hilltop; and presently the two were completely absorbed in their task. Mrs. Wing was not particularly surprised when they came in late for dinner.
3
The station on Planet One was a decidedly primitive installation, though a good deal of engineering had obviously been needed to make it habitable at all. It was located in the bottom of a deep valley near the center of the planet’s sunward hemisphere, where the temperature was normally around four hundred degrees Centigrade. This would still have been cold enough to liquefy the sulfur which formed the principal constituent of the atmosphere Ken’s people needed; but the additional hundred degrees had been obtained by terracing the valley walls, cutting the faces of the terraces to the appropriate slope, and plating them with iron. The dark-colored metal dome of the station was, in effect, at the focus of a gigantic concave mirror; and between the angular size of sun and the actual size of the dome, solar libration never moved the focus to a serious extent.
The interstellar flyer settled onto a smooth sheet of bare rock beside the dome. There were no cradling facilities, and Ken had to don vacuum armor to leave the vessel. Several other space-suited figures gathered in the airlock with him, and he suspected that most if not all of the ship’s crew were “going ashore” at the same time though, of course, they might not be crew; one operator could
handle a vessel of the Karella’s class. He wondered whether or not this was considered safe practice on a foreign planet; but a careful look around as he walked the short distance from ship to dome revealed no defensive armament, and suggested that those manning the station had no anxiety about attack. If, as had been suggested, the post had been here for twenty years, they probably should know.
The interior of the dome was comfortable enough, though Ken’s conductor made constant apology for the lack of facilities. They had a meal for which no apology was required, and Ken was shown private quarters at least as good as were provided by the average Sarrian hotel. Laj Drai took him on a brief tour of the station, and made clear the facilities which the scientist could use in his assigned job.
With his “real” job usually in mind, Ken kept constant watch for any scrap of evidence that might suggest the presence of the narcotic he sought. He was reasonably certain, after the tour, that there was no complex chemical processing plant anywhere around; but if the drug were a natural product, there might not have to be. He could name more than one such substance that was horribly effective in the form in which it was found in nature — a vegetable product some primitive tribes on his own world still used to poison their arrows, for example.
The “trading” equipment, however, proved more promising, as might have been foreseen by anyone who had considered the planet with which the trading was done. There were many remote-control torpedoes, each divided into two main sections. One of these contained the driving and control machinery and was equipped with temperature control apparatus designed to keep it near normal; the other was mostly storage space and refrigeration machinery. Neither section was particularly well insulated, either from the other or the surrounding medium. Ken examined one of the machines minutely for some time, and then began asking questions.
“I don’t see any vision transmitter; how do you see to control the thing on the planet’s surface?”
“There is none,” a technician who had been assisting Drai in the exposition replied. “They all originally had them, of course, but none has survived the trip to Three yet. We took them out, finally — it was too expensive. The optical apparatus has to be exposed to the planet’s conditions at least partly, which means we must either run the whole machine at that temperature or have a terrific temperature difference between the optical and electrical elements. We have not been able to devise a system that would stand either situation — something goes completely haywire in the electrical part under those freezing conditions, or else the optical section shatters between the hot and cold sections.”
“But how do you see to control?”
“We don’t. There is a reflection altimeter installed, and a homing transmitter that was set up long ago on the planet. We simply send the torpedo down, land it, and let the natives come to it.”
“And you have never brought any physical samples from the surface of the planet?”
“We can’t see to pick up anything. The torpedo doesn’t stay airtight at that temperature, so we never get a significant amount of the atmosphere back; and nothing seems to stick to the outer hull. Maybe it lands on a solid metal or rock surface — we wouldn’t know.”
“Surely you could make the thing hold air, even below the freezing point of sulfur?”