The flour was undisturbed. Nevertheless, there was a possibility he might have shaken out the cloth, turned it over to hide the traces of flour remaining, replaced the key, and somehow duplicated the flour pattern--or, at any rate, come close enough to fool himself, provided he was interested in fooling himself.
This checked out negative. He'd done no such thing. He defied anyone to get all the traces of flour out of the cloth without laundering it, in which case he'd been wonderfully ingenious at counterfeiting several leftover food stains.
Ergo, he hadn't touched the key. Ipso facto. Reductio ad absurdum. Non lessi illegitimis te carborundum.
Next move.
He unlocked the cellar door and lowered himself down the steps.
Which gave him much food for thought. He stood cursing softly at the sight of the chassis with more work done on it.
For the first time he felt a certain degree of apprehension. No bewilderment, as yet; too many practical examples in his lifetime had taught him that today's inexplicable mystery was tomorrow's dry fact. Nevertheless, he clumped forward with irritated impatience and stood looking down at the workbench.
All the tools were scattered about now. The tube had been wiped clean of his amateur fingerprintings yesterday, and the tools, apparently, had come clean in handling. The chassis was tipped up again, and some parts, one of which looked as though it had been revamped, had been bolted to its upper surface and wired into the growing circuit. The soldering was much cleaner; apparently he was learning.
He was also learning to walk through locked doors, damn it!
He'd left a note for himself: "What am I doing?" blockprinted in heavy letters on a shirt cardboard he'd propped against the chassis. It had been moved to one side, laid down on the far end of the bench.
There was no answer.
He glowered down at the day's paper, his eye scanning the lines, but not reading. It wasn't even in focus.
His entire jaw was aching, but he grimly concentrated past that, grinding at the situation with the sharp teeth of his mind.
The new fingerprints on the set were his, again. He was still doing a solo--or was it a duet with himself?
He'd rechecked the locks, examined the doors, tried to move the immovable hinge pins, and even tested the bedroom and cellar windows to make sure against the absurd possibility that he'd gotten them open and clambered in and out that way.
The answer was no.
But the thing in the cellar had more work done on it.
The answer was yes
That led nowhere. Time out to let the subconscious mull it over. He concentrated on the paper, focusing his blurred vision on the newspaper by main force, wondering how the starship base was doing with its mystery.
Not very well. The entire base had been quarantined, and the official press releases cut to an obfuscatory trickle.
For a moment, his anxiety about the boys made him forget his preoccupation. Reading as rapidly as he could with his foggy eye, he discovered that the base was entirely off limits to anyone now; apparently that applied to government personnel, too. The base had been cordoned off by National Guard units at a distance of two miles. The paper was beating the disease drum for all it was worth, and reporting a great deal of international anxiety on the subject.
It seemed possible now that the paper was correct in its guess. At any rate, it carried a front-page story describing the sudden journeys of several top-flight biologists and biochemists en route to the base, or at least this general area.
Cable clamped his lips into a worried frown.
He'd been in on a number of the preliminary briefings on the trip, before he'd disqualified himself. The theory had been that alien bugs wouldn't be any happier on a human being than, say, a rock lichen would be. But even the people quoting the theory had admitted that the odds were not altogether prohibitive against it, and it was Cable's experience that theories were only good about twenty-five per cent of the time in the first place.
It was at this point that the idea of a correlation between the starship's mystery and his own first struck him.
He fumed over it for several hours.
The idea looked silly. Even at second or third glance, it resembled the kind of brainstorm a desperate man might get in a jam like this.
That knowledge alone was enough to prejudice him strongly against the possibility. But he couldn't quite persuade himself to let go of it.
Item: The crew of the starship might be down with something.
Item: The base was only twenty miles away. Air-borne infection?
Item: The disease, if it was a disease, had attacked the world's first astronauts. By virtue of his jouncings-about in the prototype models, he also qualified as such.
A selective disease attacking people by occupational specialty?
Bushwah!
Air-borne infection in an air-conditioned house?
All right, his jaw ached and his vision was blurred.
He pawed angrily at his eye.
When he had conceived of interfering with the progress of the work, he'd intended it as one more cool check on what the response would be. But now it had become something of a personal spite against whatever it was he was doing in the cellar.
By ten o'clock that night, he'd worked himself into a fuming state of temper. He clumped downstairs, stood glaring at the set, and was unable to deduce anything new from it. Finally he followed the second part of his experimental program by ripping all the re-done wiring loose, adding a scrawled "Answer me!" under yesterday's note, and went to bed seething. Let's see what he did about that.
His mouth ached like fury in the morning, overbalancing his sense of general well-being. He distracted himself with the thought that he was getting a lot of sound rest, for a man on a twenty-four day, while he lurched quickly into the bathroom and peeled his lips back in front of the mirror.
He stared at the front of his mouth in complete amazement. Then he began to laugh, clutching the washbasin and continuing to look incredulously at the sight in the mirror.
He was teething!
With the look of a middle-aged man discovering himself with chicken pox, he put his thumb and forefinger up to his gums and felt the hard ridges of outthrusting enamel.
He calmed down with difficulty, unable to resist the occasional fresh temptation to run his tongue over the sprouting teeth. Third sets of teeth occasionally happened, he knew, but he'd dismissed that possibility quite early in the game. Now, despite his self-assurances at the time the bridge was fitted, he could admit that manufactured dentures were never as satisfying as the ones a man grew for himself. He grinned down at the pronged monstrosity he'd been fitting into his mouth each morning for the past year, picked it up delicately, and dropped it into the waste basket with a satisfying sound.
Whistling again for the first time in two days, he went out to the cellar door and opened it, bent, and peered down. He grunted and reached for the rail as he swung his right foot forward.
He opened his mouth in a strangled noise of surprise. He'd seen depth down those stairs. His other eye was working again--the retina had re-attached itself!
The stairs tumbled down with a crash as their supports, sawed through, collapsed under his weight. The railing came limply loose in his clutch, and he smashed down into the welter of splintered boards ten feet below.
I shouldn't, he thought to himself in one flicker of consciousness, have ripped up that set. Then he pitched into blackness again.
He rolled over groggily, wiped his hand over his face, and opened his eyes. There didn't seem to be any pain.
He was facing the stairs, which had been restored. The braces had been splinted with scrap lumber, and two of the treads were new wood. The old ones were stacked in a corner, and he half-growled at the sight of brown smears on their splintered ends.