The girl laughed. She did not seem, noted young Dr. Roswell, occupant of another seat at the captain’s table, the least bit perturbed by Grossman’s shadowy hint of menace. On the contrary, her already vivid features assumed new color at the scent of danger. Her gray-green eyes brightened, a flush highlighted the natural golden beauty of her cheeks; she bent forward interestedly.
“Please, Mister Grossman...don’t stop because of me. I want to learn everything I can about Titan. It’s going to be my home from now on, you know. I’ll learn sooner or later.”
“Ye-e-es,” acknowledged the heavy man grudgingly, “I suppose that is true. Your father is Commandant of the Space Patrol post at New Boston, isn’t he? Hasn’t he warned you of the dangers you face in coming to live with him?”
Again the girl laughed.
“Hardly! You see, he doesn’t know I’m coming. He’d have conniption fits if he knew I were aboard the Gaea. He’s a lamb, really, but terribly old-fashioned. ‘Women belong on Earth,’ you know...that sort of thing. He thinks I’m safe in a Terra boarding-school right now. If he dreamed I were less than an hour off Titan—well, I’m afraid he’d be pale violet with anger.”
“And,” reproved Grossman sternly, “rightly so. Your father is a wise man. Titan is no place for a girl of gentle breeding. It is a vile and treacherous pest-hole. It should never have been opened to Earth colonists!”
Rockingham Roswell coughed gently. The young savant was taller than any man present, and but for the conservative cut of his clothing might have looked his true weight, but he carried himself in such a way as to seem more fragile than he really was. His lean, close-shaven cheeks were pale, and his tow-colored hair was meticulously plastered to his scalp. He wore thick-lensed, tortoise-shell glasses which he removed and polished nervously as he spoke.
“In...er...in that case, Mister Grossman, it strikes me as a bit odd that you should...er...have established business headquarters on the satellite.”
Grossman glanced sharply at the slender man, snapped impatiently, “A business man cannot always pick and choose his locations, Doctor Roswell. He must follow the path of empire as it leads. Since there are Earthmen on Titan, someone must serve them. It is an obligation which cannot be refused—”
“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.”
“But that day, of course,” interposed the girl, “is a long way off. Is this the only physiological danger?”
“There is one even more dreadful. The T-radiation.”
“T-radiation? What is that?”
Grossman smiled mirthlessly.
“Were I able to tell you, I should be a greater physicist than any who have so far visited Titan. Dozens of the wisest have come, probed, pondered, analyzed...and left Titan none the wiser for their efforts. Frankly, they do not know! The very name ‘T-radiation’ is an admission of their failure. It is simply an abbreviation for ‘Titan-radiation.’ It is an electro-magnetic or radioactive emanation lethal to humans...that is all they know about it.”
Young Dr. Roswell wiped his spectacles carefully and interrupted, “But...er...but surely, Factor, these physicists were able to determine the wave-length of the radiation? Did that not tell them—?”
Grossman said bluntly, almost rudely, “The radiation lies in the Hertzian range, Doctor Roswell. Does that knowledge help you any? Perhaps now you can tell us why these rays are deadly?”
* * * *
Roswell flushed and faltered into silence. The girl glanced curiously at Grossman.
“Hertzian range, Factor?”
“Electrical waves ranging between 1 m. and 1/10 c.m. in length, Miss Graham. Their place is between the so-called ‘short waves’ of radio transmission and the infra-red or heat waves. Their existence has been known, theoretically, for at least two hundred years. But man has never been able to find a reason, a place, or use for them. Nor have they been found to occur freely in nature elsewhere than on Titan.”
“And,” asked Captain Burke, “you say these waves are deadly to humans? But how, then, have our colonists managed to win and maintain a foothold—”
“I should have said,” admitted Grossman, “the waves are deadly to unshielded humans. Lead sheathing protects the wearer from harm; consequently men in bulgers are quite safe. And one of the first acts of the Solar Space Patrolmen, upon reaching Titan, was to project a series of leaden highways or avenues between the cities of the satellite. Upon these, and only upon these, may Earthmen travel unprotected by bulgers. To stray from one of these roadbeds means exposure to the T-radiation. And that, in turn, means death!”
Rockingham Roswell shuddered delicately. “Beastly!” he murmured. “Deuced unpleasant sort of place, what? But, I say...how about