Dragons. That was what people called them. To ordinary people, there was nothing, nothing except the shiver of planoforming and the hammer blow of sudden death or the dark spastic note of lunacy descending into their minds. But to the telepaths, they were Dragons. In the fraction of a second between the telepaths' awareness of a hostile something out in the black, hollow nothingness of space and the impact of a ferocious, ruinous psychic blow against all living things within the ship, the telepaths had sensed entities something like the Dragons of ancient human lore, beasts more clever than beasts, demons more tangible than demons, hungry vortices of aliveness and hate compounded by unknown means out of the thin tenuous matter between the stars. It took a surviving ship to bring back the news--a ship in which, by sheer chance, a telepath had a light beam ready, turning it out at the innocent dust so that, within the panorama of his mind, the Dragon dissolved into nothing at all and the other passengers, themselves non-telepathic, went about their way not realizing that their own immediate deaths had been averted. From then on, it was easy--almost. * * * * * Planoforming ships always carried telepaths. Telepaths had their sensitiveness enlarged to an immense range by the pin-sets, which were telepathic amplifiers adapted to the mammal mind. The pin-sets in turn were electronically geared into small dirigible light bombs. Light did it. Light broke up the Dragons, allowed the ships to reform three-dimensionally, skip, skip, skip, as they moved from star to star. The odds suddenly moved down from a hundred to one against mankind to sixty to forty in mankind's favor. This was not enough. The telepaths were trained to become ultrasensitive, trained to become aware of the Dragons in less than a millisecond. But it was found that the Dragons could move a million miles in just under two milliseconds and that this was not enough for the human mind to activate the light beams. Attempts had been made to sheath the ships in light at all times. This defense wore out. As mankind learned about the Dragons, so too, apparently, the Dragons learned about mankind. Somehow they flattened their own bulk and came in on extremely flat trajectories very quickly. Intense light was needed, light of sunlike intensity. This could be provided only by light bombs. Pinlighting came into existence. Pinlighting consisted of the detonation of ultra-vivid miniature photonuclear bombs, which converted a few ounces of a magnesium isotope into pure visible radiance. The odds kept coming down in mankind's favor, yet ships were being lost.