Isaacs recognized the type. Quintessential bureaucrat, delighted with the sudden interest which this delegation purported to represent, but fearful because he didn't know exactly who they were or what they wanted. Isaacs eyed the man impatiently. An ominous image formed in his mind — the Russian laser gathering power for an imminent onslaught. He gritted his teeth and determined to play out the cover story until he could get a firmer feel of the situation. Where in the hell was Krone? Isaacs introduced the members of his party, and they followed Floyd into the nearby administration building. Floyd led them to his office and seated them. Just the right number of chairs had been brought in.

'Now, what can I do for you gentlemen — and lady,' Floyd corrected himself. Danielson returned his smile with a blank stare. The smile faded and he turned to Isaacs.

'This is very short notice but, of course, we are all at your disposal.'

'The President keeps tabs on all the crucial components in our research and development programme,' Isaac began, Muffing his way. 'He had heard good things about the work Dr Krone and all of you are doing here, and he wants to be brought more directly up to date.'

Floyd boomed possessively, but there was a wariness behind his smile.

'We understand this complex is autonomous,' Isaacs continued.

'Oh, yes,' said Floyd, 'our mandate comes from Los Alamos , and our budget from there and from Krone Industries, but we are self-contained and Dr Krone has a free hand to do as he wishes.' He leaned forward and assumed a frank look. 'Dr Krone is an authentic Genius, you know.'

Isaacs could hear the capital G, but something in Floyd's tone suggested that being a genius was not something proper folk did.

'He does need some help in practical matters,' Floyd continued with a self-effacing smile. 'I do what I can to make his job easier.'

'I'm sure,' replied Isaacs with an answering smile that did not quite reach his eyes.

'We were hoping to see Dr Krone.'

'Ah,' said Floyd, his face drooping mournfully,

'Dr Krone has not been well for some time. We have not seen him at all for a few months. But,' he brightened, 'all our programmes are proceeding actively.'

Isaacs divined that Floyd was in manager's heaven — all programmes routinely active and no boss to foul things up with new ideas, directions, and suggestions. Managing the affairs of a genius would be trying. He fixed on the time Floyd mentioned. A few months. What did Krone's absence imply? That was about as long as they had been tracking the black hole. Could that be coincidence?

'Is Krone available if necessary?' Isaacs persisted.

'Well, that would be difficult,' answered Floyd. 'He has a house up off the road a few miles back. A quite nice one actually, built with money from his patents, a product of his mind, he likes to say. He has always demanded his privacy there and has no phone. I'm afraid he's not in a condition to accept visitors personally.'

'May I ask what the problem is?'

Floyd was silent for a moment, then made a futile gesture with his hands.

'I've been led to understand it's nothing serious, that is to say, nothing organic. The stress, though — Dr Krone carries many responsibilities.'

Isaacs caught the implication — cracked up, occupational hazard for geniuses, not the kind of thing that happens to proper folk. Isaacs fought down a wave of despair. He could feel the mission slipping away, sabotaged, inconclusive, leaving them at the mercy of the deadly laser, on the precipice of war.

There were still the facilities to check out. Maybe they would learn something of interest. They had to move on.

'Well,' he said, with forced conviviality, 'perhaps you would care to give us a look around.'

'Certainly, certainly,' agreed Floyd, anxious to prove that all was in working order and, despite a suicidal boss, fit for presidential approval.

Floyd led them to a waiting van and played tour guide as the driver steered around the maze. There was a small section of simple tract homes and apartments for the personnel. A powerful nuclear reactor supplied the prodigious energy needs of the various experiments. They stopped at several buildings with Isaacs fuming inwardly with each passing minute. They were treated to a zoo of fantastic devices that shot, banged, sizzled, lased, fused, fried, evaporated, imploded, and exploded. Despite his growing frustration, Isaacs was impressed with Floyd's acumen in his own area. While no expert on the basic scientific and engineering principles, Floyd knew the origin and use of every nut and bolt and their price to the penny. Apparently Krone was good at picking people, as well as at creating new inventions.

At last, Runyan drew Isaacs aside.

'This is a waste of time. What the hell are we doing on this two-bit tour?'

'Goddamnit, we had to start somewhere!' Isaacs replied just as body, in a fierce whisper. He was not sure what they were looking for, but he was sure they hadn't seen it. He had been ticking off the various buildings mentally. As they climbed into the van once more and Floyd began to make noises about the end of the tour, Isaacs stopped him.

'We haven't seen that farthest building, out near that large cleared area.'

'Oh.' Floyd seemed nervous, tentative. 'These experiments I've shown you are all basically mission oriented, and each has its own project scientist. That building contains Dr Krone's own special experiments.'

He leaned closer to Isaacs and lowered his voice.

'Frankly, we regard that set up as part of the overhead. It has been frightfully expensive, but it has kept Dr Krone occupied and happy when he was not working directly on one of the other projects.'

'I'll need to see it.'

'Oh, but it was shut down when Dr Krone became — ill.' Floyd could see visions of presidential commendation vanishing with the opening of the door to that boondoggle building.

'Just the same,' Isaacs insisted.

'Very well.' Floyd gestured to the driver, and they were deposited in the drive of the far building. Perhaps, he thought, this will finally distract them from the condition of Krone himself.

Floyd dawdled over his keys, but finally accepted the inevitable and opened the door. The small group stopped immediately inside the door and craned their necks upward. The building was essentially one immense room, ten or eleven stories tall and somewhat larger in length than width. What arrested their attention was the behemoth construction which dominated the room, towering almost to the ceiling. It had the complex unfinished look of a research project as opposed to some of the production prototype devices they had just seen. An array of massive tubes projected radially from a hidden core, giving the whole structure the look of a giant monstrous hedgehog.

If Isaacs had any doubts that this was it, the look on Runyan's face banished them.

Runyan stood transfixed as his brain catalogued the components he vaguely recognized and wrestled to identify myriad paraphernalia which were foreign to him. Then he slowly moved towards the device, circled it and within a minute was scrambling up ladders and around catwalks in a furious desire to lay hands on the machine.

Ralph Floyd jittered from foot to foot, aware of the change in mood which had come over his visitors, but unable to comprehend it.

Isaacs turned to him.

'Do you know what the purpose of this thing is?'

'Only very vaguely,' replied Floyd. 'I believe Or Krone was studying states of matter at very high density. I believe he had some goal of generating large amounts of cheap energy in a new way.'

He snickered behind one hand.

'To tell you the truth, the technicians who worked in here had a private name for it — Gravel Gertie.'

Isaacs raised an eyebrow.