"I think," said Arcot as he stopped the ship at a third of a light year, "that we had best destroy those planets. We may kill many men, and innocent non-combatants, but they have killed many of our races, and it is necessary. There are, no doubt, other worlds of this Universe here that we do not know of that have felt the vengeance of Thett, and if we can cause such trouble to them by destroying these worlds, and putting the fear of our attacking their mother world into them, they will call off those other fleets. I could have been invisible to Thett's ships as we followed them here, and for the greater part of the way I was, for I was sufficiently out of their time-rate, so that they were visible only by the short ultra-violet, which would have put in their infra-red, and, no photo-electric cell will work on quanta of such low energy. When at last I was sure of the sun for which they were heading, I let them see us, and they know we are aware of their base, and that we can follow them. "I will destroy one of these worlds, and follow a fleet as it starts for their home nebula. Gradually, as they run, I will fade into invisibility, and they will not know that I have dropped back here to complete the work, but will think I am still following. Probably they will run to some other nebula in an effort to throw me off, but they will most certainly send back a ship to call the fleets here to the defense of Thett. "I think that is the best plan. Do you agree?" "Arcot," asked Morey slowly, "if this race attempts to settle another Universe, what would that indicate of their own?" "Hmmm--that it was either populated by their own race or that another race held the parts they did not, and that the other race was stronger," replied Arcot. "The thought idea in their minds has always been a single world, single solar system as their home, however." "And single solar systems cannot originate in this Space," replied Morey, referring to the fact that in the primeval gas from which all matter in this Universe and all others came, no condensation of mass less than thousands of millions of times that of a sun could form and continue. "We can only investigate--and hope that they do not inhabit the whole system, for I am determined that, unpleasant as the idea may be, there is one race that we cannot afford to have visiting us, and it is going to be permanently restrained in one way or another. I will first have a conference with their leaders and if they will not be peaceful--the _Thought_ can destroy or make a Universe! But I think that a second race holds part of that Universe, for several times we have read in their minds the thought of the 'Mighty Warless Ones of Venone.'" "And how do you plan to destroy so large a planet as these are?" asked Morey, indicating the telectroscope screen. "Watch and see!" said Arcot.