the fate of his companion, began the descent of the lower slope. Both Mallory and Miller sighted their Lugers but just then the moon was suddenly obscured again and they had to lower their guns. When the moon again reappeared, four men had already reached the safety of the opposite bank, two of whom, linked together by a rope, were just beginning to venture the crossing of the ford.
Mallory and Miller waited until they had safely completed two thirds of the crossing of the ford. They formed a close and easy target and at that range it was impossible that Mallory and Miller should miss, nor did they. There was a momentary reddening of the white waters of the rapids, as much imagined as seen, then, still lashed together they were swept away down the gorge. So furiously were their bodies tumbled over and over by the rushing waters, so often did cartwheeling arms and legs break surface, that they might well have given the appearance of men who, though without hope, were still desperately struggling for their lives. In any event, the two men left standing on the far bank clearly did not regard the accident as being significant of anything amiss in any sinister way They stood and watched the vanishing bodies of their companions in perplexity, still unaware of what was happening. A matter of two or three seconds later and they would never have been aware of anything else but once more a wisp of errant dark cloud covered the moon and they still had a little time, a very little time, to live. Mallory and Miller lowered their guns. Mallory glanced at his watch and said irritably
'Why the hell don't they start firing? It's five past one'
'Why don't who start firing?' Miller said cautiously. 'You heard. You were there. I asked Vis to ask Vukalovic to give us sound cover at one. Up by the Zenica Gap there, less than a mile away. Well, we can't wait any longer. It'll take — ' He broke off and listened the sudden outburst of rifle fire, startlingly loud n at that comparatively close distance, and smiled. ell, what's five minutes here or there. Come on. I have the feeling that Andrea must be getting a little anxious about us.'
Andrea was. He emerged silently from the shadows they rounded the first bend in the river. He said reproachfully: 'Where have you two been? You had me worried stiff.' 'I'll explain in an hour's time — if we're all still around in an hour's time,' Mallory amended grimly. Our friends the bandits are two minutes behind. I think they'll be coming in force — although they've lost four already — six including the two Reynolds got from the locomotive. You stop at the next bend up-river and hold them off. You'll have to do it by yourself. Think you can manage?'
'This is no time for joking,' Andrea said with dignity.
'And then?'
'Groves and Reynolds and Petar and his sister come with us up-river, Reynolds and Groves as nearly as possible to the dam, Petar and Maria wherever they can find some suitable shelter, possibly in the vicinity of the swing bridge — as long as they're well clear of that damned great boulder perched above it.'
'Swing bridge, sir?' Reynolds asked. 'A boulder?' 'I saw it when we got off the locomotive to reconnoitre.'
'You saw it. Andrea didn't.'
'I mentioned it to him,' Mallory went on impatiently. He ignored the disbelief in the sergeant's face and turned to Andrea. 'Dusty and I can't wait any longer. Use your Schmeisser to stop them.' He pointed north-westwards towards the Zenica Gap, where the rattle of musketry was now almost continuous. 'With all that racket going on, they'll never know the difference.'
Andrea nodded, settled himself comfortably behind a pair of large boulders and slid the barrel of his Schmeisser into the V between them. The remainder of the party moved upstream, scrambling awkwardly around and over the slippery boulders and rocks that covered the right-hand bank of the Neretva, until they came to a rudimentary path that had been cleared among the stones. This they followed for perhaps a hundred yards, till they came to a slight bend in the gorge. By mutual consent and without any order being given, all six stopped and gazed upwards.
The towering breath-taking ramparts of the Neretva dam wall had suddenly come into full view. Above the dam on either side precipitous walls of rock soared up into the night sky, at first quite vertical then both leaning out in an immense overhang which seemed to make them almost touch at the top, although this, Mallory knew from the observation he had made from above, was an optical illusion. On top of the dam wall itself the guardhouses and radio huts were clearly visible, as were the pigmy shapes of several patrolling German soldiers. From the top of the eastern side of the dam, where the huts were situated, an iron ladder — Mallory knew it was painted green, but in the half-shadow cast by the dam wall it looked black fastened by iron supports to the bare rock face, zig zagged downwards to the foot of the gorge, close by where foaming white jets of water boiled from the outlet pipes at the base of the dam wall. Mallory tried to estimate how many steps there would be in that ladder. Two hundred, perhaps two hundred and fifty, and once you started to climb or descend just had to keep on going, for nowhere was there platform or backrest to afford even the means for temporary respite. Nor did the ladder at any point afford the slightest scrap of cover from watchers on the bridge. As an assault route, Mallory mused, it was scarcely the one he would have chosen: he could not perceive of a more hazardous one.
About halfway between where they stood and the pot of the ladder on the other side, a swing bridge spanned the boiling waters of the gorge. There was little about its ancient, rickety and warped appearance to inspire any confidence: and what little confidence there might have been could hardly have survived the presence of an enormous boulder, directly above the eastern edge of the bridge, which seemed in imminent danger of breaking loose from its obviously insecure footing in the deep scar in the cliff-side. Reynolds assimilated all of the scene before him, den turned to Mallory. He said quietly: 'We've been very patient, sir.'
'You've been very patient, Sergeant — and I'm grateful You know, of course, that there is a Yugoslav division trapped in the Zenica Cage — that's just behind the mountains to our left, here. You know, too, that the Germans are going to launch two armoured divisions across the Neretva bridge at two a.m. this morning and that if once they do get across — and normally there would be nothing to stop them — the Yugoslavs, armed with their pop-guns and with hardly any ammunition left, would be cut to pieces. You know the only way to stop them is to destroy the Neretva bridge? You know that this counter-espionage and rescue mission was only a cover for the real thing?'
Reynolds said bitterly: 'I know that — now.' He pointed down the gorge. 'And I also know that the bridge lies that way.'
'And so it does. I also know that even if we could approach it — which would be quite impossible — we couldn't blow that bridge up with a truckload of explosives; steel bridges anchored in reinforced concrete take a great deal of destroying.' He turned and looked at the dam. 'So we do it another way. See that dam wall there — there's thirty million tons of water behind it — enough to carry away the Sydney bridge, far less the one over the Neretva.'
Groves said in a low voice: 'You're crazy,' and then, as an afterthought, 'sir.'
'Don't we know it? But we're going to blow up that dam all the same. Dusty and I.'
'But — but all the explosives we have are a few hand-grenades,' Reynolds said, almost desperately. 'And in that dam wall there must be ten-to twenty-feet thickness of reinforced concrete. Blow it up? How?' Mallory shook his head. 'Sorry.'
'Why, you close-mouthed — '
'Be quiet! Dammit, man, will you never, never learn. Even up to the very last minute you could be caught and made to tell — and then what would happen to Vukalovic's division trapped in the Zenica Cage? What you don't know, you can't tell.'
'But you know.' Reynolds's voice was thick with resentment. 'You and Dusty and Andrea — Colonel Stavros — you know. Groves and I knew all along that you knew, and you could be made to talk.'
Mallory said with considerable restraint: 'Get Andrea to talk? Perhaps you might — if you threatened to take his cigars. Sure, Dusty and I could talk — but someone had to know.'
Groves said in the tone of a man reluctantly accepting the inevitable: 'How do you get behind that dam wall — you can't blow it up from the front, can you?'
'Not with the means at present available to us,' Mallory agreed. 'We get behind it. We climb up there.' Mallory pointed to the precipitous gorge wall on the other side.
'We climb up there, eh?' Miller said conversationally. He looked stunned.
'Up the ladder. But not all the way. Three-quarters of the way up the ladder we leave it and climb vertically up the cliff-face till we're about forty feet above tie top of the dam wall, just where the cliff begins to overhang there. From there, there's a ledge — well, more of a crack, really — '
'A crack!' Miller said hoarsely. He was horror-stricken.
'A crack. It stretches about a hundred and fifty feet clear across the top of the dam wall at an ascending
