whose species is amoebic in that it can extrude any limbs, sense organs, or protective tegument necessary to the environment or situation in which it finds itself. My guess is that it evolved on a planet with a highly eccentric orbit, and with climatic changes so severe that an incredible degree of physical adaptability was necessary for survival. It became dominant on its world, developed intelligence and a civilization, not by competing in the matter of natural weapons but by refining and perfecting the adaptive capability. When it was faced by natural enemies, the options would be flight, protective mimicry, or the assumption of a shape frightening to the attacker.
“The speed and accuracy of the mimicry displayed here,” he continued, “particularly in the almost perfect reproduction of behavior patterns, suggests that the entity may be a receptive empath. With such effective means of self-protection available, I would say that the species is impervious to physical damage other than by physical annihilation or the application of ultrahigh temperatures, so that the concept of curative surgery would be a strange one indeed to members of that race. Virtual physical indestructibility would mean that they did not require mechanisms for selfprotection, so they are likely to be advanced in the philosophical sciences but backward in developing their technology.
“I would identify you,” Conway said, swinging around to face them, “as physiological classification TOBS.”
He walked rapidly toward the three Orligians, for the good reason that there should have been only two of them. Quickly but gently he reached out to their shoulders and slipped a finger between the straps of their harnesses and the underlying fur. On the third attempt he could not do it because the harness and the fur would not separate.
Dryly, Conway said, “Do you have any future plans or ambitions, Doctor Danalta, other than playing practical jokes?”
For a moment the head and shoulders melted and slumped into what could have been the beginnings of a Melfan carapace — the sort of disquieting metamorphosis, Conway thought, which he would have to get used to — before it firmed back to the Orligian shape.
“I am most sincerely sorry, Senior Physician,” Danalta said, “if my recent actions have caused you mental distress. The matter of physical shape is normally of complete indifference to me, but I thought that adopting the forms of the people within the hospital would be more convenient for purposes of communication and social intercourse, and I also wished to practice my mimicry as soon and as often as possible before a being who was most likely to spot any inconsistencies. On the ferrycraft I discussed it with the other members of the group, and they agreed to cooperate.
“My chief purpose in seeking a position at the hospital,” Danalta went on quickly, “was to have the opportunity of working with so large and varied a group of life-forms. To a mimic of my capabilities — and at this point I should say that they are considered greater than average among my people — this establishment represents a tremendous challenge, even though I fully realize that there will be life-forms which I may not be able to reproduce. Regarding the word ‘joker,’ this does not seem to translate into my language. But if I have given offense in this matter, I apologize without reservation.”
“Your apology is accepted,” Conway said, thinking of some of the harebrained stunts his own group of trainees had been up to many years ago — activities which had only the most tenuous connection with the practice of medicine. He looked at his watch and added, “If you are interested in meeting a large number of different life- forms, Doctor, you will shortly have your wish. All of you, please follow me.”
But the Orligian who was not an Orligian did not move. It said, “As you rightly deduced, Senior Physician, the practice of medicine is completely foreign to our species. My purpose in coming here is selfish, even pleasurable, rather than idealistic. I shall merely be using my abilities to reassure beings who are suffering from physical malfunctions by mimicking them if there are no members of their own race present to give such reassurance. Or to adapt quickly to environments which others would find lethal so that urgent treatment would not be delayed because of time wasted in the donning of protective envelopes. Or to extrude limbs of a specialized shape or function which might be capable of repairing otherwise inaccessible areas where an organic malfunction had occurred. But I am not, and should not be called, a Doctor.”
Conway laughed suddenly. He said, “If that is the kind of work you plan to do here, Danalta, we won’t call you anything else.”
CHAPTER 2
Like a gigantic, cylindrical Christmas tree Sector Twelve General Hospital hung in the interstellar darkness between the rim of the parent Galaxy and the densely populated star systems of the Greater Magellanic Cloud. In its three hundred and eighty-four levels were reproduced the environments of all the intelligent life-forms known to the Galactic Federation, a biological spectrum ranging from the ultraftigid methane life-forms through the more common oxygen-breathing types up to the weird and wonderful beings who did not breathe, or even eat, but existed by the direct absorption of hard radiation.
Sector General represented a two-fold miracle of engineering and psychology. Its supply and maintenance were handled by the Monitor Corps — the Federation’s executive and law-enforcement arm — which also saw to its nonmedical administration. But the traditional friction between military and civilian members of the staff did not occur, and neither were there any serious problems among its ten thousand-odd medical personnel, who were composed of nearly seventy differing life-forms with as many different mannerisms, body odors, and ways of looking at life.
But space was always at a premium in Sector General, and whenever possible the beings who worked together were expected to eat together — though not, of course, of the same food.
The trainees were lucky enough to find two adjoining tables, unlucky in that the furniture and eating utensils were designed for the use of dwarflike Nidian DBDGs. The vast dining hail catered to the warm-blooded, oxygen- breathing members of the staff, and one look around made plain that different species dined or talked shop or simply gossiped together at the same table. Wrong-size furniture was a discomfort which the newcomers would get used to and, in this instance, things could have been much worse.
The Melfan’s mandibles were at the right height above the table, and it was no inconvenience for the ELNTs to eat while standing. The Tralthans did everything including sleeping on their six blocky feet. The Keigians could adapt their caterpillar shapes to any type of furniture, and the Orligians, like Conway himself, could sit without too much discomfort on the armrests of the chairs. The tiny Dewatti had no problems at all, and the polymorphic Danalta had taken the shape of a Dewatti.
“The food-ordering and delivery system is standard,” Conway said, looking from one table to the other, “and the same as that used on the ships which brought you here. If you punch in your physiological classification, the menu will be displayed in your own written language. Except for Danalta. There are no special dietary requirements for the TOBS life-form, I suspect, but no doubt you have preferences? Danalta’“Your pardon, Senior Physician,” the TOBS said. While it watched the dining hall entrance, its body was twisted into a shape impossible for a Dewatti. “My attention was taken by the incredible assortment of beings who come and go here.”
“What would you like to eat?” Conway asked patiently.
The TOBS spoke without turning its Dewatti head. “Virtually anything which is not radioactive or chemically corrosive, Senior Physician. Were nothing else available I could, in a short time, metabolize the material of this dining furniture. But I eat infrequently and will not need to do so again for several of your days.”
“Fine.” Conway tapped for a steak before going on. “And Danalta, while it is very pleasant, and rare in this establishment, to be addressed properly and with respect, it can be cumbersome. So it is customary to address interns, Junior and Senior Physicians, and even Diagnosticians as Doctor. Have you seen a physiological type which you cannot reproduce?”
Conway was beginning to feel irritated at the way Danalta kept looking at the entrance while he was speaking, and wondered if it was a trait peculiar to the species and the impoliteness unintentional. Then he nearly choked when he saw that the TOBS had extruded a small eye from the back of its head to watch him.
“I have certain limitations, Doctor,” it replied. “Shape changing is relatively easy, but I cannot discard physical mass. This …”—it indicated itself—“is a small but very heavy Dewatti. And the entity who has just entered would be very difficult to reproduce.”
