“I thought you would want to know,” Toron replied, with boyish pride. “So that was one of the reasons why I rushed up here to greet you. You remember the day with our army in the mountains, when that young aviator excited your attention by stopping his airplane motor with a word, and how we perfected a machine which would send a ray which would accomplish the same thing. But perhaps you were not so intimately acquainted with our later experiments with that ray. You remember how we were not able to understand fully just why this ray accomplished what it did. This intrigued me to such an extent that I resolved to discover the secret. And I hit upon the clue just about the time that you were captured.” “Yes, yes,” Cabot interrupted, “but I am not asking about the motor-stopping ray, which became useless as soon as the enemy copied us by adopting trophil engines. What I am asking is how you destroyed the foremost planes of the enemy advance in this morning’s battle?” * * * * * Toron smiled indulgently. “Wait a paraparth,” he said. “I am just getting to that. To get back to the motor-stopping ray, which I was telling you about, I discovered that it was not the radio impulse which actually did the work, but rather a sort of sub-wave, or by-product of it, which was more of the nature of a light-wave than anything else. In fact, it was a bit like the black light of which you taught us, and which we used so effectively in our signaling and in our searchlights. This led me to turn my efforts to producing the sub-wave directly, rather than as a by-product of a radio impulse. “When this had been accomplished I discovered that this new wave worked by converting its path through the air into an electric conductor more perfect even than heavy electric cable. It was this conductive path, falling athwart the wiring of the airplane, that short-circuited the ignition and stopped the motor. “From this discovery it was but a simple step to use the wave as a power-line. In the battle this morning we would focus two rays on the fuel tank of an enemy plane, send a high potential current up one wave and down the other—and bang goes the tank. Very neat, wasn’t it?” “Toron, you’re a genius!” Cabot exclaimed, patting the other warmly on the cheek. “The radio man from the earth yields the palm to the radio man of the planet Poros.” “This is something which the holy father must know at once,” Nan-nan interjected. “In order to maintain his reputation for omniscience,” Cabot laughingly added. This reminded him that he had ignored the presence of the priest and the colonel, ever since the sudden arrival of Toron, so he turned with an apology and introduced them.