They all breathed a sigh of relief when, after three days, no more signs of the mysterious illness showed on new members of the crew. It became routine to parade before Tau stripped to the waist each morning for the inspection of the danger points, and the Medic's vigilance did not relax.
In the meantime neither Mura nor Kosti appeared to suffer. Once the initial stages of headaches and blackouts were passed, the patients lapsed into a semi-conscious state as if they were under sedation of some type. They would eat, if the food was placed in their mouths, but they did not seem to know what was going on about them, nor did they answer when spoken to.
Tau, between visits to them, worked feverishly in his tiny lab, analyzing blood samples, reading the records of obscure diseases, trying to find the reason for their attacks. But as yet his discoveries were exactly nothing. He had come out of his quarters and sat in limp exhaustion at the mess table while Dane placed before him a mug of stimulating caf-hag.
"I don't get it!" The Medic addressed the table top rather than the amateur cook. "It's a poison of some kind. Kosti went dirt-side—Mura didn't. Yet Mura came down with it first. And we didn't ship any food from Sargol. Neither did he eat any while we were there. Unless he did and we didn't know about it. If I could just bring him to long enough to answer a couple of questions!" Sighing he dropped his weary head on his folded arms and within seconds was asleep.
Dane put the mug back on the heating unit and sat down at the other end of the table. He did not have the heart to shake Tau into wakefulness—let the poor devil get a slice of bunk time, he certainly needed it after the fatigues of the past four days.
Van Rycke passed along the corridor on his way to the hydro, Sinbad at his heels. But in a moment the cat was back, leaping up on Dane's knee. He did not curl up, but rubbed against the young man's arm, finally reaching up with a paw to touch Dane's chin, uttering one of the soundless, mews which were his bid for attention.
"What's the matter, boy?" Dane fondled the cat's ears. "You haven't got a headache—have you?" In that second a wild surmise came into his mind. Sinbad had been planet-side on Sargol as much as he could, and on ship board he was equally at home in all their cabins—could he be the carrier of the disease?
A good idea—only if it were true, then logically the second victim should have been Van, or Dane—whereas Sinbad lingered most of the time in their cabins—not Kosti. The cat, as far as he knew, had never shown any particular fondness for the jetman and certainly did not sleep in Karl's quarters. No—that point did not fit. But he would mention it to Tau—no use overlooking anything—no matter how wild.
It was the sequence of victims which puzzled them all. As far as Tau had been able to discover Mura and Kosti had nothing much in common except that they were crewmates on the same spacer. They did not bunk in the same section, their fields of labor were totally different, they had no special food or drink tastes in common, they were not even of the same race. Frank Mura was one of the few descendants of a mysterious (or now mysterious) people who had had their home on a series of islands in one of Terra's seas, islands which almost a hundred years before had been swallowed up in a series of world-rending quakes—Japan was the ancient name of that nation. While Karl Kosti had come from the once thickly populated land masses half the planet away which had borne the geographical name of "Europe." No, all the way along the two victims had only very general meeting points—they both shipped on the Solar Queen and they were both of Terran birth.
Tau stirred and sat up, blinking bemusedly at Dane, then pushed back his wiry black hair and assumed a measure of alertness. Dane dropped the now purring cat in the Medic's lap and in a few sentences outlined his suspicion. Tau's hands closed about Sinbad.