the destroyer could be clearly seen in the moonlight as the vessel remorselessly continued on course without altering direction by as much as a single degree. Burckhardt found it unnerving – why was all this interest being shown in an ancient Greek ferry which spent its life plying between Istanbul and the remote peninsula of Zervos? He kept a tight grip on himself as Dietrich's rumbling voice spoke again behind his back. 'I'm wondering now whether this signalling isn't a smoke-screen put out until they get close to us. If they were expecting their own private signal from the prisoners below the course they are maintaining would make sense – they would keep on that course until they fired the first shot across our bows. Ten minutes should tell us the worst.' And having fired this last shot across the colonel's bows he quietly left the bridge and went out on deck.
Tight-lipped, Burckhardt heard him go, relieved that at long last the Abwehr man was leaving the bridge. But secretly Burckhardt agreed that Dietrich's estimate was just about right. In the next ten minutes they should know the worst.
CHAPTER FIVE
Sunday, April 6
As he struggled in the darkness with the ropes which bound his wrists. Prentice was bathed in sweat from his exertions. He lay in his bunk sprawled on his side, his ankles also tightly bound together while a further length of rope joined his wrists to his ankles, a rope drawn up so tautly that his knees were permanently bent. The fact that they had thought of turning out the cabin lights didn't help him either; it meant he had to work blindly by feel and this made ten times more difficult a task which already seemed insuperable. And because his hands were tied behind his back he had soon given up the attempt to fiddle with the knots he couldn't see, and a little later, when it struck him that they had probably used Alpenkorps climbing rope, he gave up his efforts to break the cords by stretching his wrists against them – a rope which could support a man dangling from a cliff face was hardly likely to weaken under the mere pressure of two straining wrists. So it seemed hope-lejs: a rope which couldn't be broken and which couldn't be untied. There was, however, one other alternative. Prentice was thin-boned and he had unusually slim wrists, so now he was concentrating all his strength on compressing his hands into the smallest possible area and then trying to pull them upwards through the loops which imprisoned him. His success to date had fallen rather short of the milder achievements of Houdini and for a few minutes he stopped struggling while he rested.
He was turned on his left side, facing inwards to the cabin, and while he rested he contented himself with straining to see the time by the light of the phosphorescent numerals of his watch on the table. Almost 12.10 AM so far as he could make out. In that case the guard would be looking in on them shortly – he checked the cabin every quarter-hour. With typical Teutonic punctuality he had, so far, arrived at precisely the quarter-hour. He lay listening for the sound of footsteps and heard only the distant murmur of voices. Twisting his head round, he called out in a loud whisper. 'All right, Ford?'
The sergeant, similarly bound in the next bunk, was just recovering from the pounding headache which had assailed him when he regained consciousness after the blow from Hahnemann's machine-pistol. From the sound of Prentice's voice he guessed that the lieutenant had enjoyed a less painful return to the land of the living, something which didn't entirely surprise him when he recalled Prentice's speedy recovery from a hangover after a night of Turkish hospitality. He wet his lips before replying. 'Fine and dandy, sir. We'll have to sue the Hydra 's owners for damages when we arrive back.'
Prentice grinned in the darkness. 'We might just do that, laddie. Now, the guard'll be looking in any minute, so pretend you're still out cold.'
'Got it, sir.' The faint hammering inside his brain was sending waves of dizziness through Ford, a sensation which wasn't improved by the Aegean waves outside which regularly lifted the ship and tilted the cabin with an unpleasant rolling motion. Combined with his dizziness, Ford had the feeling that he was turning over and over and over. It cost him a certain effort to make his enquiry. 'Making any progress, sir?'
'A bit,' Prentice lied cheerfully, 'but not enough yet. I think they used steel hawser cable to truss us up.' He checked his watch again. Nearly a quarter past twelve. Was the guard going to be late this time? The curtains were closed over the porthole so the cabin was in almost total darkness except for the light seeping in from the door which was not quite closed. He found that slightly ajar door tantalizing – for all the use that unlocked door was to Prentice at the moment it might have been locked and bolted on the outside. But it did give him warning of the guard's approach as he proceeded with his unvarying patrol. After he had entered the cabin to make his quick check on the prisoners he continued his slow tread along the companionway and Prentice, who had exceptional hearing, found previously that he was able to follow the tramp of the retreating boots and their progress up the distant staircase which ended with the thud of a door closing. So his sentry-go also took in the open deck aloft, God help him. But for Prentice this made sense – the German commander, knowing there was little risk of an emergency while they were on board, was conserving his manpower, letting his troops rest as best they could before morning. Prentice lifted his head, then called out quickly. 'Here he comes!'
The Alpenkorps guard reached the door and reacted with his normal caution, switching on the light and entering the cabin with his rifle levelled. He stood there for a moment, watching the two inert bodies, then peered round the cabin to make sure that it was empty. As he left he switched off the light and closed the door firmly. Lying on his bunk, Prentice used a little army language wordlessly – now he couldn't hear the basket marching away and, more to the point, he wouldn't be able to hear him coming back again. Gritting his teeth, he renewed the struggle to free himself, pushing down his left hand to hold the rope taut while he compressed his right hand and pulled upwards, wriggling a wrist which was now moist with sweat. The moisture might help, might eventually make it a little easier to slip his wrist upwards out of that biting rope. To give himself extra leverage he pressed his bound feet against the side of the bunk, breathing heavily as he strained desperately at the rope. Five minutes later he lay limp and exhausted by his exertions, taking in great breaths of muggy air as he summoned up his strength for a renewed onslaught. The cabin seemed to be tilting more steeply now and the woodwork was groaning as though the timbers might give under the enormous pressure of the sea. The effort to free himself had been so great that his head was beginning to ache badly and he felt that he had a steel band drawn round his temples. A light flashed briefly and he bit his lips. God, this was no time to black-out. A second later he lay still as a dead man, his heart pounding with excitement. That flash of light hadn't been his eyes playing him tricks. The light had flashed from the companionway as someone opened and closed the door soundlessly. Someone had come inside the cabin!
Fear. Uncertainty. Growing alarm. The emotions darted across his fatigued brain as he continued to lie quite still, straining his ears, trying to accustom his eyes to the darkness quickly. The trouble was that damned sentry lighting up the cabin had taken away his night sight for a few minutes and he wished he hadn't watched him through half-closed eyes. Had Ford also realized what had happened – that some unknown person had crept inside their cabin with uncanny silence? He had no idea. His ears had still provided no evidence that there was someone else present but instinctively Prentice knew that they were no longer alone. He found the stillness unnerving, the creaking of the ship ominous, and the thought that someone who moved like a ghost was approaching him terrifying. His mind was strained, his nerves strung up to fever pitch with their recent experiences, and now a nightmare idea flooded over him – someone had been sent in to kill them quietly. A knife in the chest, then a swift despatch overboard into the Aegean. Feverishly his imagination worked it out: the German commander might not want his unit to know about an episode like this, or perhaps there was an SS section aboard. Lying helpless in the darkness, bis nerves close to breaking-point, he foresaw the next step – the hand coming out of the darkness to feel over his chest, finding the right place, the upheld hand striking downwards with one savage thrust. Keep a grip on yourself, for Christ's sake, Prentice… His heart jumped, his throat went dry, he felt he was choking – now he could see something, a shadow which had interposed itself between the bunk and the phosphorescent hands of his watch on the table. The intruder was feet away, standing beside his bunk, looking down at him. He tried to call out, but croaked instead, a sound like a bullfrog. A hand touched his cheek and he jerked involuntarily.
'Keep quiet! Listen!'
Prentice was stunned, lay absolutely still with sheer shock. The voice had spoken in English with a distinct Scots burr. He swallowed quickly and kept his voice down to little more than a whisper.
'Who is it?'
The voice ignored the question, speaking in an urgent Morse-code fashion. 'Keep still! I have a knife… I'll cut
