problem, because, deep inside the operative field, the light sources on the instruments were likewise obscured.

The Tralthan Senior had been closest so that only the front of its bubble helmet had been affected. One of its eyes curled back to regard Conway through the still transparent rear section.

“We require assistance, Conway. Can you suggest a …” Hossantir began; then it noticed the trembling hands and added, “Are you indisposed?”

Conway clenched his fists slowly — everything seemed to be happening in the slowest of slow motion-and said, “It is temporary.”

Silently he added, I hope.

But the alien personalities who were not really there were still clamoring for attention. He tried to ignore all but one of them at a time, thinking vaguely of the principle of divide and rule, but that did not work either. All of them were offering medical or surgical advice, all of it had potential value in the present situation, and all of it called for an immediate response. The only available material which did not force itself forward was the Gogleskan data accidentally provided by Khone, and that was of little value anyway. But for some reason his mind kept returning to it, holding on to that frightened but strong-willed alien personality as if it were some kind of psychological life- raft.

Khone’s presence was not at all like the sharp, intense, and artificially enhanced impressions produced by the Educator tapes. He found himself concentrating on the little being’s mental imprint, even though the strange and visually terrifying creatures around the operating frame threatened to throw it into a panic reaction. But the Gogleskan data also included material on Conway’s work at the hospital, transferred to its mind during the mishap on Goglesk, and this to a certain extent had prepared Khone for just this kind of experience. It was also a member of a race of individualists whose mental processes were adept at avoiding contact with, or of negating the influence of, other beings around them.

More than any other entity in Conway’s experience, Khone knew how to ignore people.

All at once his hands were no longer shaking and the alien babel within his mind had quieted to an insistent murmur which he could choose to ignore. He tapped the Melfan assisting Hossantir sharply on its carapace.

“Please withdraw and leave your instruments in position,” he said. To the Tralthan Senior he added, “The bleeding is obscuring everything in the operative field, including the magnifiers and light sources of the instruments and, if we approach closely, our visors. We must …

“Suction isn’t working, Conway,” Hossantir broke in, “and won’t until the flow has been checked at source. But we can’t see the source!”

… Use the scanners,” Conway continued quietly, enclosing the tiny, hollow-coned handles of the Melfan clamp with his Earthhuman fingers, “in conjunction with my hands and your eyes.

Since normal vision was useless because of his helmet’s close proximity to the spray from the wound, Conway’s idea was that Hossantir use two scanners angled so as to bear on the operative field from two viewpoints as far apart as possible. This would give an accurate stereoscopic picture of what was happening which the Senior could describe for him and guide the movements of his clamp. He would be operating blind, but only long enough to find and seal off the bleeder, after which the operation would proceed in the normal way. It would be a very uncomfortable few minutes for Hossantir, two of whose four eyes would be extended laterally to the limits of its flattened, ovoid helmet. It would also have to withdraw temporarily from the operation, Conway told it apologetically, so that its scanners and helmet would not be affected by the spray.

“This could give me a permanent squint,” Hossantir said, “but no matter.”

None of his alter egos saw anything funny in the idea of a great, elephantine Tralthan with a squint in two of its widely extensible eyes. Fortunately, a smothered Earth-human laugh was not translatable.

His hands and the instruments felt heavy and awkward, and not just because he was using Melfan clamps. The gravity nullification field surrounding him did not, of necessity, extend to the patient, so that everything at the operating site weighed four times heavier than normal. But the Tralthan used its scanners to guide him verbally to the blood vessel which had to be origin of the massive hemorrhaging, and considering the elevated blood pressure of the Hudlar life-form, he expected to feel resistance as he clamped it off.

There was none, and the bleeding continued with undiminished force.

One of his alter egos had encountered something like this situation during a transplant on an entirely different life-form, a diminutive Nidian whose blood pressure had been only a fraction of that of this Hudlar. On that occasion the blood flow had also been a fine spray rather than the pulsing stream characteristic of arterial bleeding, and the trouble had been due to a mechanical failure rather than to faulty surgical technique.

Conway was not sure if that was the problem here, but a part of his multiple mind felt sure, and he decided to trust that part.

“Stop the artificial heart,” he said firmly. “Cut off the blood supply to the area.

“We can easily make good the blood loss,” Hossantir objected, “but cutting off circulation for more than a few minutes could kill the patient.”

“Do it now,” Conway said.

Within a few seconds the bright red spray had subsided and died. A nurse cleaned Conway’s visor while Hossantir used suction to clear the operative field. They did not need the scanners to see what had happened.

“Technician, quickly,” Conway said.

Before he had finished speaking there was a furry little Nidian, looking like a gift-wrapped teddy bear in its transparent OR suit, hovering beside his elbow.

“The nonreturn valve of the connector is jammed in the closed position,” the Nidian said in its staccato, barking speech. “This was caused, I would say, by the valve setting being altered accidentally when it was struck by one of the surgical instruments. The flow from the artificial heart has been blocked and was forcing its way out via the recess of the valve setting control, hence the fine, highpressure spray. The valve itself isn’t damaged, and if you will raise the organ so that I will have space to reset the valve …”

“I’d rather not move the heart,” Conway said. “We are very short of time.”

“I am not a doctor,” the Nidian said crossly. “This repair should properly be performed on a workbench, or at least in an area with room for my admittedly small elbows. Working in close contact with living tissue is … is repugnant to me. However, my tools are sterile in readiness for such emergencies.”

“Do you feel nauseous?” Conway asked worriedly. He had visions of the little being choking inside its helmet.

“No,” the Nidian said, “just irritated.”

Conway withdrew his Melfan instruments to give the technician more room to work. A nurse had clipped a tray of Earth-human DBDG instruments to the frame beside him, and by the time he had selected the ones he would need the Nidian had freed the jammed valve. Conway was thanking the little being for the speed of the repair when Hossantir broke in.

“I’m restarting the artificial heart,” it said.

“No, wait,” Conway said sharply. He was looking at the monitor and getting a feeling-a very vague feeling that was not strong enough even to be called a hunch-that any delay at all would be dangerous. “I don’t like the vital signs. There is nothing there which should not be there, considering that the flow from the artificial heart was interrupted, initially by the jammed connector valve and later when the system was shut down during the repair. I realize that if the artificial heart is not restarted within the next few minutes, irreversible changes leading to termination will take place in the brain. Even so, I have the feeling that we should not restart but go instead for an immediate resection of the replacement orgao …

He knew that Hossantir would want to object and take the safer course, that of restarting the artificial heart and waiting until they were sure that the patient’s circulation had returned to optimum, and then proceed as originally planned. Normally Conway would not have argued against this, because he, too, preferred not to take unnecessary risks. But there was something niggling at the back of his mind, or one of his minds, something about the effect of longterm trauma on certain gravid, heavy-gravity life-forms, and the feeling was so persistent that he had to act on it. And while he had been speaking, Conway had unclipped his instruments to show Hossantir, nonverbally so that the Senior’s feelings would not be hurt too much, that he was not about to argue the point.

“… Will you work on the connection to the absorption organ, please,” he ended, “and keep an eye on the monitor.”

Sharing the operative field with the Tralthan, Conway worked quickly and carefully in the restricted space,

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