Garboreggg made no answer. To that impassive, cold, inhuman thing, it did not matter if a nation or a whole world perished. Phobar had already seen with what deliberate calm it destroyed a city, merely to show him what power the lords of Xlarbti controlled. Besides, what guarantee was there that the invaders would not loot the Earth of everything they wanted and then annihilate all life upon it before they departed? Yet Phobar knew he was helpless, knew that the men of Earth would be forced to do whatever was asked of them, and trust that the raiders would fulfill their promise. "Two hours remain for your stay here," came the ruler's dictum to interrupt his line of thought. "For the first half of that period you will tell me of your world and answer whatever questions I may ask. During the rest of the interval, I will explain some of the things you wish to learn about us." Again Phobar felt Garboreggg's disdain, knew that the metal giant regarded him as a kind of childish plaything for an hour or two's amusement. But he had no choice, and so he told Garboreggg of the life on Earth, how it arose and along what lines it had developed; he narrated in brief the extent of man's knowledge, his scientific achievements, his mastery of weapons and forces and machines, his social organization. When he had finished, he felt as a Stone Age man might feel in the presence of a brilliant scientist of the thirty-fourth century. If any sign of interest had shown on the peak of the metallic lord, Phobar failed to see it. But he sensed an intolerant sneer of ridicule in Garboreggg, as though the ruler considered these statements to be only the most elementary of facts. Then, for three quarters of an hour, in the manner of one lecturing an ignorant pupil, the giant crowded its thought-pictures into Phobar's mind so that finally he understood a little of the raiders and of the sudden terror that had flamed from the abysses into the solar system. * * * * * "The universe of matter that you know is only one of the countless universes which comprise the cosmos," began Garboreggg. "In your universe, you have a scale of ninety-two elements, you have your color-spectrum, your rays and waves of many kinds. You are subject to definite laws controlling matter and energy as you know them. "But we are of a different universe, on a different scale from yours, a trillion light-years away in space, eons distant in time. The natural laws which govern us differ from those controlling you. In our universe, you would be hopelessly lost, completely helpless, unless you possessed the knowledge that your people will not attain even in millions of years. But we, who are so much older and greater than you, have for so long studied the nature of the other universes that we can enter and leave them at will, taking what we wish, doing as we wish, creating or destroying worlds whenever the need arises, coming and hurtling away when we choose.