the quartz in his portholes. His adversary, though evidently as anxious to dodge, seemed to lack the necessary control. It lurched first one way, then the other, seeking escape. The flame died out in seconds, leaving a cloud of dense white smoke which gleamed in the tank?s running lights; but either the brief fire had been sufficient or the smoke was equally deadly, for the monster?s disorganization grew steadily worse. Its aimless steps grew shorter and feebler as the legs gradually lost the power to support its vast bulk, and presently it stumbled and rolled on one side. The legs kicked frantically for a time, while the long neck alternately retracted and stretched to full length, lashing the fanged head frantically through the air and against the ground. By sunrise the only remaining motion was an occasional twitch of head or leg; within a minute or two thereafter all activity of the giant creature ceased. The crew of the Bree had already swarmed overboard and across the dark patch where the snow had boiled from the ground, bent on acquiring meat. The deadly white cloud was farther downwind now, and gradually settling. Lackland was surprised to note traces of black dust on the snow where the cloud had passed. “Barl, what on Earth — or rather, on Mesklin — was the stuff you used for that fire cloud? And didn’t it occur to you that it might crack the windows in this tank?” The captain, who had remained on the ship and was near one of his radios, answered promptly. “I’m sorry, Charles; I didn’t know what your windows are made of, and never thought of our flame cloud as a danger to your great machine. I will be more careful next time. The fuel is simply a dust which we obtain from certain plants — it is found as fairly large crystals, which we have to pulverize very carefully and away from all light.” Lackland nodded slowly, digesting this information. His chemical knowledge was slight, but it was sufficient to make a good guess at the fuel’s nature. Ignited by light — burned in hydrogen with a white cloud — black specks on the snow — it could, as far as he knew, be only one thing. Chlorine is solid at Mesklin’s temperature; it combines violently with hydrogen, and hydrogen chloride is white when in fine powder form; methane snow boiled from the ground would also give up its hydrogen to the voracious element and leave carbon. Interesting plant life this world sported! He must make another report to Toorey — or perhaps he had better save this tidbit in case he annoyed Rosten again. “I am very sorry I endangered your tank.” Barlennan still seemed to feel apologetic. “Perhaps we had better let you deal with such creatures with your gun; or perhaps you could teach us to use it. Is it, like the radios, especially built to work on Mesklin?” The captain wondered if he had gone too far with this suggestion, but decided it had been worth it. He could neither see nor interpret Lackland’s answering smile. “No, the gun was not remade or changed for this world, Barl. It works fairly well here, but I’m afraid it would be pretty useless in your country.” he picked up a slide rule, and added one more sentence after employing it for a moment. “The farthest this thing could possibly shoot at your pole would be just about one hundred fifty feet.” Barlennan, disappointed, said nothing further. Several days were spent in butchering the dead monster. Lackland salvaged the skull as a further protection from Rosten’s ire, and the cavalcade resumed its journey. Mile after mile, day after day, the tank and its tow inched onward. Still they sighted occasional cities of the rock-rollers; two or three times they picked up food for Lackland which had been left in their path by the rocket; quite frequently they encountered large animals, some like the one Barlennan’s fire had slain, others very different in size and build. Twice specimens of giant herbivores were netted and killed by the crew to furnish meat, much to Lackland’s admiration. The discrepancy in size was far greater than that existing between Earthly elephants and the African pygmies who sometimes hunted them. The country grew hillier as they progressed, and with the rising ground the river, which they had followed intermittently for hundreds of miles, shrank and split into numerous smaller streams. Two of these tributaries had been rather difficult to cross, requiring that the Bree be unlashed from the sled and floated across at the end of a towrope while tank and sled drove below the surface on the river bed. Now, however, the streams had become so narrow that the sled actually bridged them and no such delays occurred. At long last, fully twelve hundred miles from where the Bree had wintered and some three hundred south of the equator, with Lackland bowing under an additional half gravity, the streams began to bear definitely in the general direction of their travel. Both Lackland and Barlennan let several days pass before mentioning it, wishing to be sure, but at last there was no more doubt that they were in the watershed leading to the eastern ocean. Morale, which had never been low, nevertheless improved noticeably; and several sailors could now always be found on the tank’s roof hoping for the first glimpse of the sea as they reached each hilltop. Even Lackland, tired sometimes to the point of nausea, brightened up; and as his relief was the greater, so proportionately greater was his shock and dismay when they came, with practically no warning, to the edge of an escarpment; an almost sheer drop of over sixty feet, stretching as far as the eye could see at right angles to their course.
For long moments nothing was said. Both Lackland and Barlennan, who had worked so carefully over the photographs from which the map of their journey had been prepared, were far too astonished to speak. The crew, though by no means devoid of initiative, decided collectively and at the first glance to leave this problem to their captain and his alien friend. “How could it have been there?” Barlennan was first to speak. “I can see it’s not high, compared to the vessel from which your pictures were taken, but should it not have cast a shadow far across the country below, in the minutes before sunset?”
“It should, Barl, and I can think of only one reason it escaped us. Each picture, you recall, covered many square miles; one alone would include all the land we can see from here, and much more. The picture that does cover this area must have been made between sunrise and noon, when there would have been no shadow.”
“Then this cliff does not extend past the boundary of that one picture?”
“Possibly; or, just as possibly, it chanced that two or three adjacent shots were all made in the morning — I don’t know just what course the photo rocket flew. If, as I should imagine, it went east and west, it wouldn’t be too great a coincidence for it to pass the cliff several times running at about the same time of day. “Still, there’s little point in going through that question. The real problem, since the cliff obviously does exist, is how to continue our journey.” That question produced another silence, which lasted for some time. It was broken, to the surprise of at least two people, by the first mate. “Would it not be advisable to have the Flyer’s friends far above learn for us just how far this cliff extends to either side? It may be possible to descend an easier slope without too great a detour. It should not be hard for them to make new maps, if this cliff was missed on the first.” Barlennan translated this remark, which was made in the mate’s own language. Lackland raised his eyebrows. “Your friend may as well speak English himself, Barl — he appears to know enough to understand our last conversation. Or do you have some means of communicating it to him that I don’t know about?” Barlennan whirled on his mate, startled and, after a moment, confused. He had not reported the conversation to Dondragmer; evidently the Flyer was right — his mate had learned some English. Unfortunately, however, the second guess had also some truth; Barlennan had long been sure that many of the sounds his vocal apparatus could produce were not audible to the Earthman, though he could not guess at the reason. For several seconds he was confused, trying to decide whether it would be better to reveal Dondragmer’s ability, the secret of their communication, both together, or, if he could talk fast enough, neither. Barlennan did the best he could. “Apparently Dondragmer is sharper than I realized. Is it true that you have learned some of the Flyer’s language, Don?” This he asked in English, and in a pitch that Lackland could hear. In the shriller tones that his own language employed so much he added, “Tell the truth — I want to cover up as long as possible the fact that we can talk without his hearing. Answer in his own language, if you can.” The mate obeyed, though not even his captain could have guessed at his thoughts. “I have learned much of your language, Charles Lackland. I did not realize you would object.”
“I don’t mind at all, Don; I am very pleased and, I admit, surprised. I would gladly have taught you as well as Barl if you had come to my station. Since you have learned on your own — I suppose from comparing our conversations and your captain’s resultant activities — please enter our discussion. The suggestion you made a moment ago was sound; I will call the Toorey station at once.” The operator on the moon answered immediately, since a constant guard was now being maintained on the tank’s main transmitter frequency through several relay stations drifting in Mesklin’s outer ring. He indicated understanding of the problem, and promised that a survey would be made as quickly as possible. “As quickly as possible,” however, meant quite a number of Mesklin’s days; and while waiting the trio endeavored to formulate other plans in case the cliff could not be rounded within a reasonable distance. One or two of the sailors expressed a willingness to jump down the cliff, to Barlennan’s anxiety — he felt that the natural fear of height should not be replaced with complete contempt, even though the entire crew now shared his willingness to climb and jump. Lackland was called upon to
