I eyed him with speculation. Here was not a man who would take kindly to imaginative conjecture. So Dr. Lyon Sprague was not the man I'd like to talk to. With an inward smile, I said, "I have a rather new idea about Mekstrom's that I'd like to discuss with the right party."

He looked down at me, although our eyes were on the same level. "I doubt that any layman could possibly come up with an idea that has not been most thoroughly discussed here among the research staff."

"In cold words you feel that no untrained lunk has a right to have an idea."

He froze. "I did not say that."

"You implied, at least, that suggestions from outsiders were not welcome. I begin to understand why the Medical Center has failed to get anywhere with Mekstrom's in the past twenty years."

"What do you mean?" he snapped.

"Merely that it is the duty of all scientists to listen to every suggestion and to discard it only after it has been shown wrong."

"Such as--?" he said coldly, with a curl of his eyebrows.

"Well, just for instance, suppose some way were found to keep a victim alive during the vital period, so that he would end up a complete Mekstrom Human."

"The idea is utterly fantastic. We have no time for such idle speculation. There is too much foggy thinking in the world already. Why, only last week we had a Velikovsky Adherent tell us that Mekstrom's had been predicted in the Bible. There are still people reporting flying saucers, you know. We have no time for foolish notions or utter nonsense."

"May I quote you?"

"Of course not," he snapped stiffly. "I'm merely pointing out that non-medical persons cannot have the grasp--"

The door opened again and a second man entered. The new arrival had pleasant blue eyes, a van d.y.k.e beard, and a good-natured air of self-confidence and competence. "May I cut in?" he said to Dr. Sprague.

"Certainly. Mr. Cornell, this is Scholar Phelps, Director of the Center.

Scholar Phelps, this is Mr. Steve Cornell, a gentleman of the press," he added in a tone of voice that made the identification a sort of nasty name. "Mr. Cornell has an odd theory about Mekstrom's Disease that he intends to publish unless we can convince him that it is not possible."

"Odd theory?" asked Scholar Phelps with some interest. "Well, if Mr.

Cornell can come up with something new, I'll be most happy to hear him out."

Dr. Lyon Sprague decamped with alacrity. Scholar Phelps smiled after him, then turned to me and said, "Dr. Sprague is a diligent worker, businesslike and well-informed, but he lacks the imagination and the sense of humor that makes a man brilliant in research. Unfortunately, Dr. Sprague cannot abide anything that is not laid out as neat as an interlocking tile floor. Now, Mr. Cornell, how about this theory of yours?"

"First," I replied, "I'd like to know how come you turn up in the nick of time."

He laughed good-naturedly. "We always send Dr. Sprague out to interview visitors. If the visitor can be turned away easily, all is well and quiet. Dr. Sprague can do the job with ease. But if the visitor, like yourself, Mr. Cornell, proposes something that distresses the good Dr.

Sprague and will not be loftily dismissed, Dr. Sprague's blood pressure goes up. We all keep a bit of esper on his nervous system and when the fuse begins to blow, we come out and effect a double rescue."

I laughed with him. Apparently the Medical Center staff enjoyed needling Dr. Sprague. "Scholar Phelps, before I get into my theory, I'd like to know more about Mekstrom's Disease. I may not be able to use it in my article, but any background material works well with writers of fact articles."

"You're quite right. What would you like to know?"

"I've heard, too many times, that no one knows anything at all about Mekstrom's. This is unbelievable, considering that you folks have been working on it for some twenty years."

He nodded. "We have some, but it's precious little."

"It seems to me that you could a.n.a.lyze the flesh--"

He smiled. "We have. The state of a.n.a.lytical chemistry is well advanced.

We could, I think, take a dry sc.r.a.ping out of the cauldron used by MacBeth's witches, and determine whether Shakespeare had reported the formula correctly. Now, young man, if you think that something is added to the human flesh to make it Mekstrom's Flesh, you are wrong. Standard a.n.a.lysis shows that the flesh is composed of exactly the same chemicals that normal flesh contains, in the same proportion. Nothing is added, as, for instance, in the case of calcification."

"Then what is the difference?"

"The difference lies in the structure. By X-ray crystallographic method, we have determined that Mekstrom's Flesh is a micro-crystalline formation, interlocked tightly." Scholar Phelps looked at me thoughtfully. "Do you know much about crystallography?"

As a mechanical engineer I did, but as a writer of magazine articles I felt I should profess some ignorance, so I merely said that I knew a little about the subject.

"Well, Mr. Cornell, you may know that in the field of solid geometry there are only five possible regular polyhedrons. Like the laws of topology that state that no more than four colors need be used to print a map on a flat surface, or that no more than seven colors are required to print separate patches on a toroid, the laws of solid geometry prove that no more than five regular polyhedrons are possible. Now in crystallography there are only thirty-two possible cla.s.ses of crystal lattice construction. Of these only thirty have ever been discovered in nature. Yet we know how the other two would appear if they did emerge in natural formation."

I knew it all right but I made scribblings in my notebooks as if the idea were of interest. Scholar Phelps waited patiently until I'd made the notation.

"Now, Mr. Cornell, here comes the shock. Mekstrom's Flesh is one of the other two cla.s.ses."

This was news to me and I blinked.

Then his face faded into a solemn expression. "Unfortunately," he said in a low voice, "knowing how a crystal should form does not help us much in forming one to that cla.s.s. We have no real control over the arrangement of atoms in a crystal lattice. We can prevent the crystal formation, we can control the size of the crystal as it forms. But we cannot change the crystal into some other cla.s.s."

"I suppose it's sort of like baking a cake. Once the ingredients are mixed, the cake can be big or small or shaped to fit the pan, or you can spoil it complete. But if you mix devil's food, it either comes out devil's food or nothing."

"An amusing a.n.a.logy and rather correct. However I prefer the one used years ago by Dr. w.i.l.l.y Ley, who observed that a.n.a.lysis is fine, but you can't learn how a locomotive is built by melting it down and a.n.a.lyzing the mess."

Then he went on again. "To get back to Mekstrom's Disease and what we know about it. We know that the crawl goes at about a sixty-fourth of an inch per hour. If, for instance, you turned up here with a trace on your right middle finger, the entire first joint would be Mekstrom's Flesh in approximately three days. Within two weeks your entire middle finger would be solid. Without anesthesia we could take a saw and cut off a bit for our research."

"No feeling?"

"None whatever. The joints knit together, the arteries become as hard as steel tubing and the heart cannot function properly--not that the heart cares about minor conditions such as the arteries in the extremities, but as the Mekstrom infection crawls up the arm toward the shoulder the larger arteries become solid and then the heart cannot drive the blood through them in its accustomed fashion. It gets like an advanced case of arteriosclerosis. Eventually the infection reaches and immobilizes the shoulder; this takes about ninety days. By this time, the other extremities have also become infected and the crawl is coming up all four limbs."

He looked at me very solemnly at that. "The rest is not pretty. Death comes shortly after that. I can almost say that he is blessed who catches Mekstrom's in the left hand for them the infection reaches the heart before it reaches other parts. Those whose initial infection is in the toes are particularly cursed, because the infection reaches the lower parts of the body. I believe you can imagine the result, elimination is prevented because of the stoppage of peristalsis. Death comes of autointoxication, which is slow and painful."

I shuddered at the idea. The thought of death has always bothered me.

The idea of looking at a hand and knowing that I was going to die by the calendar seemed particularly horrible.

Taking the bit between my teeth, I said, "Scholar Phelps, I've been wondering whether you and your Center have ever considered treating Mekstrom's by helping it?"

"Helping it?" he asked.

"Sure. Consider what a man might be if he were Mekstrom's all the way through."

He nodded. "You would have a physical superman," he said. "Steel-strong muscles driving steel-hard flesh covered by a near impenetrable skin.

Perhaps such a man would be free of all minor pains and ills. Imagine a normal bacterium trying to bore into flesh as hard as concrete. Mekstrom Flesh tends to be acid-resistant as well as tough physically. It is not beyond the imagination to believe that your Mekstrom Superman might live three times our frail four-score and ten. But--"

Here he paused.

"Not to pull down your house of cards, this idea is not a new one. Some years ago we invited a brilliant young doctor here to study for his scholarate. The unfortunate fellow arrived with the first traces of Mekstrom's in his right middle toe. We placed about a hundred of our most brilliant researchers under his guidance, and he decided to take this particular angle of study. He failed; for all his efforts, he did not stay his death by a single hour. From that time to the present we have maintained one group on this part of the problem."

It occurred to me at that moment that if I turned up with a trace of Mekstrom's I'd be seeking out the Highways in Hiding rather than the Medical Center. That fast thought brought a second: Suppose that Dr.

Thornd.y.k.e learned that he had a trace, or rather, the Highways found it out. What better way to augment their medical staff than to approach the victim with a proposition: You help us, work with us, and we will save your life.

That, of course, led to the next idea: That if the Highways in Hiding had any honest motive, they'd not be hidden in the first place and they'd have taken their cure to the Medical Center in the second. Well, I had a bit of something listed against them, so I decided to let my bombsh.e.l.l drop.