`Then what about shooting 'em up and having a basinful of soup ourselves ?' suggested Algy, ever practical.
Ìt may sound silly, but that'd be a bit too much like murder for my liking. I've a better idea than that.'
`What is it ?'
Ì've got a feeling that I'd like to borrow their big boat.'
Ànd abandon the Didgeree-du? Not likely.' `We could come back and fetch it later on.' `
But they would find it.'
`Not necessarily. Anyway, if we covered it with mud and rushes there 's a chance they wouldn't tumble on it. They'll stick around the shed. My feeling is, if we can get hold of that boat we ought not to let the opportunity pass. The Didgeree-du may be bogged permanently for all we know, and if that turned out to be the case we should be in a fine old mess.'
`You're right there,' admitted Algy. 'All right then ; let 's have a dekko at the front of the building and see what 's happening there.'
`There 's no need for us both to go. You get back to the machine and start camouflaging it while I do the reconnoitring. I'll join you as soon as I can.'
Without protest Algy disappeared into the dunes. Biggles, taking the time-bomb with him, made his way to the front of the hangar, where he found his task even easier than he expected, for the place was deserted, and the great boat rode silently at her moorings, made fast by a single line from the bows. He scrutinized the shadows closely for a sentry, but he could not see one—not that he expected to, for had he been in the position of the chief pilot of the flying-boat he would not have thought it necessary to mount a guard.
Turning his attention to the door, a broad smile spread over his face as he realized how completely chance had played into his hands ; for the small door had not only been left open, but there, on the outside, was the key still in the lock. He waited for no more, but hurried back to Algy, whom he found just completing his task, made possible by the fact that the tide was now receding, and the creek was only inundated to a depth of two feet or so. It was now possible to see how hopelessly the Didgereedu was bogged, for her wheels, one lower than the other, were completely under the sand.
Biggles wasted no time in idle contemplation of it. 'Come on,' he said urgently. 'We're all set. The machine's as good as ours.' Briefly he related the circumstances. 'Lend me your pencil, and let me have a page out of your note-book,' he concluded.
`What 's the idea ?' inquired Algy as he passed them over.
Ì'm going to slip a note under the door telling those fellows about the hole in the wall.'
`Why ?'
Òtherwise they may never find it.'
`What does it matter ?'
`We can't leave the poor blighters to starve to death—anyway, they may be some time getting out, and I'm going to drop an egg on this place at the first opportunity. I should hate to do it thinking they might still be inside. Bombing's all right up to a point, but Algy nodded. 'Yes, to bomb the place after pinching their boat would be adding insult to injury,' he agreed. 'Well, let's get on with it.'
They returned to the store depot, where they found everything just as Biggles had last seen it. You get to the boat and make ready to cast off when you see me coming,' he ordered. 'The engines must still be warm, so they ought to start at the first spark.'
He gave Algy time to reach the boat, and a few minutes' grace after he had gone aboard, and then crept silently to the door. Very gently he closed it. The key turned in the lock without a sound. Then, taking the note he had written from his pocket, he slipped it through the crack. He could still hear the murmur of conversation inside ; it had gone on, unbroken, all the time he had been near the door, and he knew that the Germans were in blissful ignorance of what was happening. Picking up the time-bomb, more because they had only one or two at the base and he thought they might need it, than for any immediate purpose, he walked down to the flying-boat and went aboard.
Ìt's all right, you can relax; there's no hurry,' he told Algy, who had cast off and was now sitting with his hand on the throttle.
`Shall I start up ?' asked Algy.
`Go ahead.'
Àre you going to fly her or shall I ?'
`You,' returned Biggles briefly. 'I'm going to have a nap. Tell me when we're home.'
With his left hand on the master throttle, Algy started the engines, and the giant boat began to surge towards the open sea.
Biggles opened a side window and looked out, but nothing happened, for reasons which he knew. Still, he smiled at the thought of the consternation that must now be going on within the tin walls of the building.
The flying-boat rocked gently as she struck the swell of the Baltic; then her engines picked her up and she roared into the night sky.
Biggles noticed that Algy was laughing. 'Yes, war's a funny thing,' he remarked, supposing that he knew the cause of Algy's mirth.
Ìt's funnier than you think,' declared Algy, going off into fresh peals of laughter.
Biggles looked at him curiously. 'Why this sudden flood of hilarity ?' he demanded. '
Come on, what's the joke ?'
`Did you ever read in the Bible about a camel going through the eye of a needle ?'
Biggles stared. 'I don't get it.'
Ì'm only wondering what we're going to do with this leviathan when we do get her home.'
Biggles frowned suddenly as understanding flashed upon him. 'Stiffen the crows,' he muttered, 'I hadn't thought of that.'
`Neither had I, until we started. She won't go into the cave, or anything like it. Even if we were able to pull her wings off, which I doubt, the fuselage would just about block the entrance.'
Biggles stroked his chin. 'It's just like you to think of something difficult when everything looked easy,' he observed bitterly. 'Work it out yourself. I'm tired. Tell me when we get to the island. I'm going to sleep.'
And sleep he did, until Algy nudged him in the ribs and warned him that they were nearly in.
Biggles woke up and stretched, yawning. `That's better,' he announced as the flying-boat glided down to a smooth landing, with enough way on her to carry her to the mouth of the cave. Opening a side window he looked out, ready to hail if he saw anyone, for he realized that there was a chance of their being fired on. But the base seemed to be entirely deserted.
`Where the deuce is everybody ?' asked Algy.
Ì expect they're asleep,' returned Biggles. `Don't make a noise , there's no need to wake them up,' he went on, as they walked along the huge, tapering wing of the flying-boat and jumped ashore.
`Hm, this is odd,' he continued a few minutes later as they reached the depot, still without any one appearing. 'One would have thought there would have been somebody on duty.'
They went all round the depot, but the only person they could find was Roy, who, with earphones still clamped on his head, lay asprawl his desk, sleeping the sleep of exhaustion. The British and German code-books lay beside him ; the pencil with which he had been working was still between his fingers.
`Poor little beggar,' whispered Biggles, `he's absolutely all in, which isn't surprising considering the length of time he's been at this desk. I suppose he tried to hang on until we got back, but flopped out over his work. You can't keep awake indefinitely. I've been asleep at the joystick before today. I think we may as well let him sleep on. Ginger isn't back, that's certain, but what on earth can have happened to Briny and the Flight-Sergeant.'
Ì suppose they've gone to look for Ginger.' `Yes—of course, that's it. Well, I must say this
looks a pretty dead sort of hole. Hullo! What's this ?' Biggles picked up a sheet of paper that lay by itself half concealed under Roy's face. Very gently he drew it clear and picked it up. It was marked across the top, in big block letters, URGENT. `Good heavens, it's a signal,' he said tersely. 'It must have come in while we were away. Roy's decoded it, too—what's this ?'
Biggles read the message aloud. "Urgent. Enemy naval supply depot suspected on northeast coast of East Prussia, probably among sand-dunes north
of the Gutte Channel. It is of vital importance that it be located immediately and destroyed."'
Biggles stared at Algy. 'What do you know about that ?' he muttered.
Ìt must be the place we've just left.'
Òf course it is. There couldn't be two of them so close to each other. What a confounded nuisance we didn't finish the job while we were there. Well, it'll have to wait now. I'm dead on my feet. I couldn't take a machine to that sandbank and back if the Empire depended on it. I can hardly see out of my eyes.'
`You look about played out,' murmured Algy seriously. 'You're certainly not fit to fly until you've had some sleep; you'd only crash and kill yourself if you tried. I tell you what; I'm fresher than you are ; you lie down and get some sleep. I'll take the Platypus and make a quick trip to the sandbank. I hope those fellows are not still inside the building.'
Biggles glanced towards the entrance of the cave and saw that it was now grey with the approach of dawn. 'They'll be outside by now,' he said definitely. 'They will have found my note telling them how to get out, so they'll probably be on the beach watching for a ship to take them off. When they see you coming they'll guess what you're going to do and clear of If they hang around it'll be their own funeral. After all, there 's a war on and orders are orders. All right, old lad. I'd be obliged if you would slip back and do the job; one bomb ought to be enough.'
Ì'll get along right away,' declared Algy. 'You get some sleep. When I come back we'll hunt round for the others.'
`Good! I'll see you off.'
Without waking Roy, they left the signals room and made their way along the catwalk to the Platypus. A single 1 12-1b. bomb was slung on the central bomb-rack, and Algy was about to get into his seat when Biggles picked up the time-bomb which he had brought back with him. 'You might as well take this,' he suggested. 'If you miss with your bomb, and the Boche are a fair distance away, you might land and do the job with this one. We'
ve got to make sure of the place. It won't take up any room, anyway, so no harm will be done if you have to bring it back.' He placed the square charge of explosive on the rear seat.
Ì tell you what would be a good thing to take,' said Algy suddenly.
`What ?'
Òne of those sub-machine-guns from store. If the Huns are still about, and I expect they will be, they might start shooting at me, and—well, I'd feel happier if I had a mobile weapon in case I had to land, or was forced down.'
`That 's true,' agreed Biggles. 'Stand fast. I'll fetch you one.'
He was soon back with a vicious-looking weapon, and some clips of ammunition, which he arranged securely within Algy's reach. 'Don't forget this is our last machine,' he reminded him as Algy climbed into the cockpit.
Ì'll try not to bust it,' Algy promised.
Biggles ran to the mouth of the cave and looked up at the sky. 'Don't be too long away,'
he called. Ì don't like the look of the weather.'
Algy waved to signify that he had heard and taxied out on to the cove.
Biggles waited for him to take off and then made his way slowly to the mess. He looked into the kitchen as he passed, wishing that he had the energy to get himself some breakfast ; but his one overwhelming desire was for sleep, and he lay back on his bed with a sigh of relief, not intending to sleep immediately, but to rest for a few minutes before undressing. But nature, long denied, decided otherwise. His eyes closed, and he sank into a heavy dreamless sleep of utter weariness.
The hour hand of the clock on the mantelpiece ticked its way slowly round the dial, and still he did not awake. Another hour went by and still he slept, unaware that the sun had been blotted out by a dark indigo curtain that rose swiftly from the northern horizon.
Presently, too, this curtain was blotted out by whirling flakes of snow that eddied about the entrance to the cave before dropping silently on the sullen water. And still he slept on, unaware of the silence, a sinister silence broken only by the relentless ticking of the clock on the mantelpiece.
He did not hear the tramp of feet that came cautiously along the catwalk. He neither heard nor saw the door open as Erich von Stalhein, an automatic in his hand, entered the room.
The German counter-espionage officer fitted a cigarette into a long holder, lighted it, and blew a smoke ring into the air. On his face was an expression of extreme contempt. For a little while he considered the sleeping figure thoughtfully; then, reaching forward, he tapped him on the shoulder with the pistol.
Biggles's eyes opened. A shadow of amazement
swept through them as they came to rest on the German's austere face. Slowly he raised himself on one elbow.
`You know, von Stalhein, you're becoming a positive pest,' he muttered petulantly. 'Why can't you let a fellow sleep ?'
Von Stalhein smiled sardonically. 'Don't worry,' he purred. 'Very soon you shall go to sleep for a long, long time.'
Biggles eyed him reflectively. 'Just what do you mean by that ?' he inquired.
Ì mean that in the past I have too often delayed what—knowing you—should have been done immediately. On this occasion there is going to be no such delay. I trust my meaning is now plain.'
Biggles nodded. 'Well, I expect as you're a German you can't help it,' he murmured. 'But really, von Stalhein, your mother should have taught you that it isn't customary to shoot prisoners of war. It isn't done. I insist on a fair trial.'
`You had one, on the Leipzig.'
Biggles realized the futility of protest. 'Purely as a matter of detail, how did you find your way here ?' he asked.
The German held up Biggles's map. 'It was most thoughtful of you to make pencil marks that brought me almost directly to Bergen Ait. An officer of your experience should have known better.'
`You're quite right. I deserve to be shot for such criminal folly,' agreed Biggles. 'How did you get here—in the drifter ?'
Òf course. It picked me up, so after landing those saved from the Leipzig I came straight on here—not alone, of course. I have a score of marines outside. They are just checking your very interesting stores. I suppose you realize that you have committed a flagrant breach of international law in installing yourself here, on neutral territory ?'
Biggles did not enlighten the German as to the facts of the case ; he would discover them in due course. 'You're a nice one to talk about breaches of international law,' he sneered.
`Suppose I ask a few questions for a change ?' suggested von Stalhein. 'Where are your friends ?'
A ray of hope shot through Biggles's mind, for all the time he had been talking, although he had not shown it, one terrible thought was uppermost in his mind. It was Roy, in the signals room, whom he was thinking about, for on his desk lay the most vital document any German agent could hope to secure—the British secret code-book. The German code was there, too, but that didn't matter. At first he had taken it for granted that Roy had been found, and the code-book with him ; but now, in view of the German's question, it began to look as if this was not so, otherwise von Stalhein would have commented on it. One of his few weaknesses was vanity, and if he had indeed secured the code-book he could hardly have refrained from gloating over it.
So Biggles merely effected a yawn. 'Why, aren't they here ?' he inquired.
Von Stalhein regarded him narrowly. `No,' he snapped, 'they're not. But doubtless they will return in due course. I'll wait for them—but there is no reason why you should. I have a firing party on parade outside. I presume it will not be necessary for me to use force to induce you to report yourself to them. I will make the necessary introduction before the unterofizier takes charge.'
Biggles rose slowly from the bed. 'You won't object to my having a cigarette ?' he said politely.
Òf course not,' replied von Stalhein reproachfully. 'Is there anything else I can do for you—any messages—you know the sort of thing ? I hate being dramatic, but at such moments as this it is usual
Biggles lighted a cigarette and flicked the dead match away. 'That 's very kind of
you, von Stalhein,' he said coldly. 'I hope to do as much for you one day.'
The German smiled confidently. 'Then you will have to be very quick about it. Shall we go ?'
Biggles nodded. 'I suppose we may as well.'
Von Stalhein clicked to attention and bowed as Biggles preceded him through the door to the depot.
A squad of marines, under an N.C.O., was in line, waiting.
CHAPTER XV
HAPPENINGS ON THE ROCK
ROY was still asleep over his work when the Germans entered the cave, but his door was open, and it must have been some sound made by them that caused him to wake up with a start. For a moment or two, still heavy with sleep, he stared about him uncomprehendingly ; then, realizing where he was, he looked at his watch, wondering how long he had been asleep.
To his relief he saw that everything was exactly as he had left it. There was nothing to show that Biggles and Algy had returned and visited the signals room, so he assumed, therefore, that they were still away, and he was still puzzling over their prolonged absence when a sound reached his ears that took him quickly to the side window of his cabin, which commanded a view of the entrance to the cave.
The sight that met his eyes caused him to go cold with horror. He blinked, shook his head, and looked again, hoping that what he saw was merely a dream—a very unpleasant dream—for coming along the catwalk was a file of German marines. At the mouth of the cave he could see the boat from which they had landed, and beyond it, a huge fuselage bearing the swastika of the German Air Force.
For two or three seconds he could only stare in wide-eyed consternation, his brain racing and his thoughts chaotic; the one fact that he seemed capable of grasping was that in the absence of everybody the base had been attacked in force by the enemy. Not for one moment did he doubt that he was alone in the depot. There was no reason why he should.
He assumed automatically that had anyone else been there some sort of resistance would have been made. He was not to know, of course, that the German flying-boat had actually been flown to the base by Algy.
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