Why, you sarcastic.. . Conway raged silently. But before he could speak there was an interruption. Thornnastor’s analyzer was displaying bright, incomprehensible symbols on its screen and vocalizing its findings through the translator link.
Analysis of samples one through fifty-three taken in Observation Ward One, A UGL Level, it began tonelessly. General observations: All atmosphere samples contain oxygen, nitrogen and the usual trace elements in the normal proportions, also small quantities of carbon dioxide, water vapor and chlorine associated with the acceptable levels of leakage from the TLTU life-support system and the Illensan protective suit, and from the expired breaths of the DBDG, DBLF, ELNT, FGLI and FROB physiological types, as well as perspiration from the first, second and third of these types. Also present are the phenomes associated with the body odors of the species present who are not wearing overall body protection envelopes, including a hitherto unlisted set, which, by elimination, belongs to the DBPK patient. There are very small quantities of dusts, flakings and fibers abraded from walls, working surfaces and instruments. Some of this material cannot be analyzed without a larger sampling, but it is biochemically inert and harmless. There are also present follicles of Earth-human hair, Kelgian and DBPK fur, flakes of discarded Hudlar nutrient paint, and scales from Tralthan and Melfan tegument.
Conclusion: None of the gases, dusts, colloidal suspensions, bacteria or viruses found in these samples are harmful to any oxygen-breathing life-form.
Without realizing it Conway had been holding his breath, and the inside of his visor misted over briefly as he released it in a short, heavy sigh of disappointment. Nothing. The analyzer could not find anything harmful in the ward.
“I’m waiting, Doctor,” said O’Mara.
Conway looked slowly around the ward, at Thornnastor still undergoing artificial respiration, at the Kelgian theater nurse and the spread-eagled Melfan, at the silent Gilvesh and the TLTU hissing quietly in a corner, at the crowded pressure litter and at the beings of several different classifications attached to breathing masks-and found them all looking at him. He thought desperately: Something is loose in here. Something that did not show up in the samples or that the analyzer had classified as harmless anyway. Something that had been harmless, on board the Rhabwar…
Aloud, he said, “On the trip back to the hospital we examined and dissected several DBPK cadavers, and thoroughly examined and gave preliminary treatment to the survivor, without body protection and without suffering any ill effects. It is possible that the beings, Earth-human and otherwise, on the Rhabwar all had natural immunity, but that, to my mind, is stretching coincidence beyond its elastic limits. When the survivor was brought into the hospital, protection became necessary because four different physiological types practically dropped in their tracks. We have to ask ourselves, In what way were the circumstances aboard the ambulance ship and in the hospital different?
“We should also ask ourselves,” Conway went on, “the question Pathologist Murchison asked after completing her first DBPK dissection, which was, How did a weak, timid and obviously non-aggressive life-form like this one climb to the top of its planet’s evolutionary ladder and stay there long enough to develop a civilization capable of interstellar travel? The being is a herbivore. It does not even have the fingernails that are the evolutionary legacy of claws, and it appears to be completely defenseless.”
“How about concealed natural weapons?” O’Mara asked. But before Conway could reply, Murchison answered for him.
“No evidence of any, sir,” she said. “I paid particular attention to the furless, brownish area of skin at the base of the spine, since this was the only feature of the being’s physiology that we did not understand. Both male and female cadavers possessed them. They are small mounds or swellings, four to five inches in diameter and composed of dry, porous tissue. They do not secrete anything and give the appearance of a gland or organ that is inactive or has atrophied. The patches were a uniform pale brown color on the adults. The survivor, who is a female adolescent or preadolescent, as far as we can judge, had a pale pink mound, which had been painted to match the coloration of the adult patches.”