Later. "But, Minnie, ve shall hope. Vun hundred vifty thousand miles out, it vas. It vill fall back upon der earth. But I gannot tell vhere! I thought that if it did, I vould be able to galculate its course, und--But after those goncentric cirgles--Minnie, not even _Einstein_ could galculate vhere it vill land. Not effen _me_. All ve can do iss hope that ve shall hear of vhere it falls." Cloudy day. Black night jealous of its mysteries. "Minnie, our poor Mitkey. There iss _nothing_ could have gauzed--" But something had. Prxl. Prxl is an asteroid. It isn't called that by earthly astronomers, because--for excellent reasons--they have not discovered it. So we will call it by the nearest possible transliteration of the name its inhabitants use. Yes, it's inhabited. Come to think of it, Professor Oberburger's attempt to send a rocket to the moon had some strange results. Or rather, Prxl did. You wouldn't think that an asteroid could reform a drunk, would you? But one Charles Winslow, a besotted citizen of Bridgeport, Connecticut, never took a drink when--right on Grove Street--a mouse asked him the road to Hartford. The mouse was wearing bright red pants and vivid yellow gloves-- But that was fifteen months after the Professor lost his rocket. We'd better start over again. * * * * * Prxl is an asteroid. One of those despised celestial bodies which terrestrial astronomers call vermin of the sky, because the darned things leave trails across the plates that clutter up the more important observations of novae and nebulae. Fifty thousand fleas on the dark dog of night. Tiny things, most of them. Astronomers have been discovering recently that some of them come close to Earth. Amazingly close. There was excitement in 1932 when Amor came within ten million miles; astronomically, a mere mashie shot. Then Apollo cut that almost in half, and in 1936 Adonis came within less than one and a half million miles. In 1937, Hermes, less than half a million but the astronomers got really excited when they calculated its orbit and found that the little mile-long asteroid _can_ come within a mere 220,000 miles, closer than Earth's own moon. Some day they may be still more excited, if and when they spot the 3/8-mile asteroid Prxl, that obstacle of space, making a transit across the moon and discover that it frequently comes within a mere hundred thousand miles of our rapidly whirling world.