But instead of hurtling toward distant Arisia it swept around in a mighty circle and struck in direct central impact the great cruiser of the Eich. There was an appalling crash, a space-wracking detonation, a flare of incandescence incredible and indescribable as the energy calculated to disrupt--almost to volatilize--a world expended itself upon the insignificant mass of one Boskonian battleship and upon the unresisting texture of the void. X. Considerably more than the stipulated week passed before Kinnison was done with the librarian and with the long-range communicator beam, but eventually he succeeded in enlisting the aid of the fifty-three most eminent scientists and thinkers of all the planets of Galactic Civilization. From all over the Galaxy were they selected; from Vandemar and Centralia and Alsakan; from Chickladoria and Radelix; from the solar systems of Rigel and Sirius and Antares. Millions of planets were not represented at all; and of the few which were, Tellus alone had more than one delegate. This was necessary, Kinnison explained carefully to each of the chosen. Sir Austin Cardynge, the man whose phenomenal brain had developed a new mathematics to handle the positron and the negative energy levels, was the one who would do the work; he himself was present merely as a co-ordinator and observer. The meeting place, even, was not upon Tellus, but upon Medon, the newly acquired and hence entirely neutral planet. For the Gray Lensman knew well the minds with which he would have to deal. They were all the geniuses of the highest rank, but in all too many cases their stupendous mentalities merged altogether too closely upon insanity for any degree of comfort. Even before the conclave assembled it became evident that jealousy was to be rife and rampant; and after the initial meeting, at which the problem itself was propounded, it required all of Kinnison's ability, authority, and drive, and all of Worsel's vast diplomacy and tact, to keep those mighty brains at work. Time after time, some essential entity, his dignity outraged and his touchy ego infuriated by some real or fancied insult, stalked off in high dudgeon to return to his own planet; only to be coaxed or bullied, or even mentally man-handled by Kinnison or Worsel, or both, into returning to his task. [Illustration: _Time after time some essential scientist stalked off in high dudgeon, with Kinnison trailing, soothing ruffled ego._]