All of their instruments for measuring distances utilize the radio-activity of the nuclei of various elements to accomplish their ends. The gamma ray, for which they have, of course, another name, being uninfluenced by the most powerful magnetic forces, is naturally the ideal medium for their purposes. It moves in a straight line and at uniform speed until it meets an obstruction, where, even though it may not be deflected, it is retarded, the instrument recording such retardation and the distance at which it occurs. The sounding device utilizes the same principle. The instrument records the distance from the ship at which the ray encounters the resistance of the ocean’s bottom; by constructing a right triangle with this distance representing the hypotenuse it is simple to compute both the depth of the ocean and the distance from the ship at which bottom was found, for they have a triangle of which one side and all three angles are known.
Owing to their extremely faulty maps, however, the value of these instruments has been greatly reduced, for no matter what course they lay, other than due north, if they move in a straight line they are always approaching the antarctic regions. They may know that land is ahead and its distance, but they are never sure what land it is, except where the journey is a short and familiar one. For this reason they cruise within sight of land wherever that is practical, with the result that journeys that might otherwise be short are greatly protracted. Another result is that the radius of Amtorian maritime exploration has been greatly circumscribed; so much so that I believe there are enormous areas in the south temperate zone that have never been discovered by the Vepajans or the Thorists, while the very existence of the northern hemisphere is even unguessed by them. On the maps that Danus showed me considerable areas contained nothing but the single word joram, ocean.
However, notwithstanding all this (and possibly because of it), I was confident that we could manage to navigate the ship quite as satisfactorily as her present officers, and in this Kiron agreed.
“At least we know the general direction of Thora,” he argued; “so all we have to do is sail in the other direction.”
As our plans matured, the feasibility of the undertaking appeared more and more certain. We had recruited twenty prisoners, five of whom were Vepajans, and this little band we organized into a secret order with passwords, which were changed daily, signs, and a grip, the last reminiscent of my fraternity days in college. We also adopted a name. We called ourselves Soldiers of Liberty. I was chosen vookor, or captain. Gamfor, Kiron, Zog, and Honan were my principal lieutenants, though I told them that Kamlot would be second in command if we were successful in taking the ship.
Our plan of action was worked out in detail; each man knew exactly what was expected of him. Certain men were to overpower the watch, others were to go to the officers’ quarters and secure their weapons and keys; then we would confront the crew and offer those who chose an opportunity to join us. The others—well, there I was confronted with a problem. Almost to a man the Soldiers of Liberty wanted to destroy all those who would not join us, and really there seemed no alternative; but I still hoped that I could work out a more humane disposition of them.
There was one man among the prisoners of whom we were all suspicious. He had an evil face, but that was not his sole claim upon our suspicions—he was too loud in his denunciation of Thorism. We watched him carefully, avoiding him whenever we could, and each member of the band was warned to be careful when talking to him. It was evident to Gamfor first that this fellow, whose name was Anoos, was suspicious. He persisted in seeking out various members of our group and engaging them in conversation which he always led around to the subject of Thorism and his hatred of it, and he constantly questioned each of us about the others, always insinuating that he feared certain ones were spies. But of course we had expected something of this sort, and we felt that we had guarded against it. The fellow might be as suspicious of us as he wished; so long as he had no evidence against us I did not see how he could harm us.
One day Kiron came to me evidently laboring under suppressed excitement. It was at the end of the day, and our food had just been issued to us for the evening meal—dried fish and a hard, dark-colored bread made of coarse meal.
“I have news, Carson,” he whispered.
“Let us go off in a corner and eat,” I suggested, and we strolled away together, laughing and talking of the day’s events in our normal voices. As we seated ourselves upon the floor to eat our poor food, Zog joined us.