"Er ... quite!" acknowledged Roswell confusedly. "Job of work to be done ... noble noble sacrifice ... the white man's burden ... all that sort of rot ... what?" Unaccountably, Grossman flushed. "If you are trying to imply, sir," he fumed, "that I have any ulterior motive in establishing a trading post on Titan--" "Oh, gracious, no! Nothing of the sort. I wouldn't presume to question your ... er ... business acumen, Factor. I'm hardly the type, what?" Roswell smiled a faint, thin, apologetic smile. "I mean I ... er ... I really don't know much about this sort of thing ... if you know what I mean...." * * * * * Captain Burke stared at the younger man impatiently. A spaceman toughened in the crucible of action, he had little patience with such learned young fops as this passenger. His words were polite, as befitted the skipper of a luxury liner, but his tone was brushed with acid. "If you don't mind, Doctor Roswell, Factor Grossman was about to tell us something about the hazards of Titan. Well, Mister Grossman?" Grossman took another appreciative sip of his brandy, set down the tulip-glass, and steepled his fingers. "Well, the perils of Titan fall into several classes. Geographic, physiological and racial. In the first place, it is a satellite approximately the size of Earth's moon ... large enough to sustain life, but small enough to be influenced by the perturbations not only of its massive primary, which lies a scant seven hundred and sixty thousand miles away, but also by the attractive forces of the Ring and Saturn's eight _other_ satellites. "Evidence of this is the peculiarity interwoven orbit trajectories of Titan and its nearest sister, Hyperion, which sometimes approach each other perilously close. Were Titan a sphere of pumaceous formation, like Luna, it would long since have burst into a million fragments under the impact of these conflicting forces. Fortunately, it is of a basaltic nature, and consequently reasonably stable. "More immediately hazardous are what might be called the physiological dangers of Titan. These are multifold. To begin with, there is the so-called 'water' of the orb--" "I've read about that," nodded Captain Burke gravely. "Not water at all, but--" "But a deadly corrosive acid," finished the speaker, "yes! Happily, the 'seas' of Titan do not cover such a share of the planet's surface as do those of Earth; if they did, no life--either flora or fauna--would ever have developed upon the little world." His heavy shoulders shivered. "Still ... imagine frothing, tide-swept lakes as large as Lake Erie or Victoria Nyanza splashing endlessly at shores until inch by inch and foot by foot those beaches are eroded, rotted, eaten away by the action of the fluid they contain! These are the 'oceans' of Titan. There are four of them, fed by subterranean sources we have not yet discovered. One day they will have completely devoured the parent planet, and Titan will cease to be."