'Then it would be right out of your hands, I know,' Harry answered.
Again Clarke's snort. 'Right out of control is more like it!' he answered.
'Well, and that's another reason for my going in,' Harry was almost fatalistic about it. To see if there's anything we can do about it — which is maybe better done from the other side.'
The two were silent a while, then Clarke said: 'Harry, the rest of your gear will take a little time to get hold of. But it's being done. It's very late now and I'm overdue for my bed. I'll catch a couple of hours and be here to see you off in the morning. Before I go, is there anything else I can do for you? And what will you do with yourself for the rest of the night?'
Harry shrugged. 'Oh, I'm not tired,' he said, 'but I will try to get some sleep later. It's silly, I know, but I'd rather tackle that underground river during the daylight hours. I mean, I could go tonight, but I don't fancy that.'
'Silly? What's silly about it?'
'Because day or night will make no difference down there. It's pitch dark all the time. It's just that I'll feel happier knowing it's daylight outside. But anyway, before I do anything I have to speak to Mobius again.'
Lost for words, Clarke shook his head. Harry always had this effect on him. 'You know,' he finally said, 'we're both part of the same world, you and I, but when you talk like that, so naturally, matter-of-factly — about the dead, and about these talents of yours, the Mobius Continuum and what all; the way you say: "I'm going to speak to Mobius", just like that — Jesus, it's like you're an alien! Or else it's like I'm a small kid again. I mean, I know what you can do, I've experienced it. But still I sometimes doubt my own senses.'
Harry smiled, open and honest. 'And you're the boss of E-Branch!' he said. 'Maybe you've got the wrong job, Darcy.'
He waited until Clarke had left before he went to see Mobius…
In Leipzig it was 10:30 a.m. and the graveyard was locked for the night. But of course Harry didn't go in through the gates but through a door, went to see the man who'd taught him to unlock all such doors.
Harry, my boy, I'm glad you've come, said Mobius. I've been doing some thinking about this conjectural parallel universe of yours.
'It gets less conjectural all the time,' Harry told him. 'Only its nature is conjectural now.' And he quickly brought the dead mathematician up to date.
Fascinating! said Mobius. And indeed it confirms my own thoughts on the matter.
'Well, I have to admit it only baffles me,' said Harry. There is light at the end of the tunnel, so to speak, but… I mean if there are two gates on this side, why does there only appear to be one on the other?'
Only one? What makes you say that?
'Faethor talked about a shining white door in the shape of a sphere. One door. If there'd been two, wouldn't Old Belos have mentioned the fact?'
Well, whether he did or didn't, there are two, I assure you. Mobius sounded convinced. Two on this side, and two on that. I can explain the principle very simply, without going into a lot of mathematical detail.
'I'm all ears,' said Harry.
Right, Mobius got down to business. Let's consider these 'gateways' a little less intensely, a little more basically. These 'doors' which defy the physical laws of that state which we call space-time. We know there are several sorts, and that all of them warp the 'skin' of this space-time dimension. Modern scientists readily admit of one such: the black hole. And they make guesses about another sort, which they've termed white holes. In fact a current theory has it that white and black holes are two ends of the same tunnel. The black sucks material in, and the white expels it. Agreed?
Harry nodded. 'So I understand,' he said.
Very well. Now, even if the theory is wrong and they're not two sides of the same coin, there remains one factor common to both.
'Which is?'
That they're both one-way systems.' Once you enter a black hole, you don't get out again. And once you've been expelled from a white hole, there's no way back in. The way I see it, the same thing applies to your grey holes: this Gate at Perchorsk, and the second Gate which you believe lies somewhere along the course of this underground river.
'One-way systems?'
Each of them! Emphasis on 'each'. You go in through one, and you come out through the other!
It stopped Harry dead in his tracks. Finally he said: That's brilliant! Once you use a Gate, it's out of bounds. Having passed you through, it won't accept you again, no matter which end you started out from. But a second gate will! So all I have to do is find the second Gate. In fact, I already know where it is! It's the Gate the Wamphyri have been using to send their monstrosities through to Perchorsk.'
Ah, but that's what it is, not where it is, said Mobius.
'It's a step in the right direction, anyway,' Harry replied. Then he sobered a little. There is however one small drawback. If I come through that Gate into Perchorsk, they'll not only shoot me, they'll probably fry me, too!'
Ah-! but here Mobius could only shrug.
Thanks, anyway,' said Harry. 'You've confirmed what I was already suspecting: that there have to be two Gates. The Wamphyri have been using one for thousands of years, and now they've started using the new one, which Luchov and his crowd inadvertently blasted into being at Perchorsk. It's the only explanation. So… if you'll excuse me now I'll be on my way. I have to say goodbye to my mother. She'd never forgive me if I did something like this without telling her.' He sighed. 'She'll want to try to talk me out of it — even knowing she can't. But… she's like that.'
All mothers are like that, Harry, said Mobius, very seriously. Good luck, my boy.
But in fact, luck would have very little to do with it…
The next morning Darcy Clarke met Harry at E-Branch HQ in London, and while Harry checked his equipment, making sure he knew how to use it, Clarke took the opportunity to pass on a little information.
'About this subterranean tributary of the Danube,' he said. 'Harry, it's a death-trap! I had it checked out overnight. Our man in Bucharest looked into it for you. The place is known well enough and we have its exact location. There are newspaper clippings concerning it, various bits of documentation. The locals have an immemorial dislike for it. In 1966 a couple of cavers took it on. It was summer and the tributary was running dry at the time. Four hours after they started in there was a flash flood up in the mountains. One body was washed out, the other lost forever. And these were experts.'
'And they were walking and swimming,' said Harry. 'I won't be.'
'Eh?'
'I said I was going up to the watercourse, but I didn't say how.'
Clarke gasped, 'You'll use the Mobius Continuum?'
'Of course.'
'Then why the wet-suit, aqualung and all?'
'Just in case.'
Clarke fell silent for a moment, then said: 'I was only trying to help.'
'And I appreciate it,' Harry told him. 'But I know my own business best.'
Ten minutes later he took up his gear in a waterproof kit-bag and went to Radujevac. From the outskirts of the town he caught a taxi into the countryside close to the location Clarke had given him. He paid his driver with money from the same source. With his bag over his shoulder he set off down a country track, eventually arriving at his destination. It was a wild place and there was no one around. Harry dumped his kit in a copse and covered the bag with dead branches, then returned to the site of the resurgence.
It was in the base of a cliff, overgrown with ivy, where limestone outcrops glistened with moisture. To the north-east stood the grey, forbidding Carpathians, and to the south sloping wooded countryside. Harry stood on the banks of the pool under the cliffs and looked again at the mountains, then down at the dark water where it gurgled into view from untold caverns of gloom. It issued from the mouth of a cave. This was the spot where Old Belos of the Wamphyri first entered our world. And others like him. And between here and those legendary mountains, somewhere underground, lay a gateway to an alien world. Now it was Harry's task to pin-point that Gate as accurately as possible before setting out up the river to find it.