Further argument was futile. Davies by an effort seemed to sweep the subject from his thoughts, and I did my best to do the same. At any rate the air was cleared--we were friends; and it only remained to grapple with the main problem in the light of the morning's interview.

Every word that I could recollect of that critical conversation I reviewed with Davies, who had imperfectly understood what he had not been directly concerned in; and, as I did so, I began to see with what cleverness each succeeding sentence of von Bruning's was designed to suit both of two contingencies. If we were innocent travellers, he was the genial host, communicative and helpful. If we were spies, his tactics had been equally applicable. He had outdone us in apparent candour, hiding nothing which he knew we would discover for ourselves, and contriving at the same time both to gain knowledge and control of our movements, and to convey us warnings, which would only be understood if we were guilty, that we were playing an idle and perilous game, and had better desist. But in one respect we had had the advantage, and that was in the version Davies had given of his stranding on the Hohenhorn. Inscrutable as our questioner was, he let it appear not only that the incident was new to him, but that he conjectured at its sinister significance. A little cross-examination on detail would have been fatal to Davies's version; but that was where our strength lay; he dared not cross-examine for fear of suggesting to Davies suspicions which he might never have felt. Indeed, I thought I detected that fear underlying his whole att.i.tude towards us, and it strengthened a conviction which had been growing in me since Grimm's furtive midnight visit, that the secret of this coast was of so important and delicate a nature that rather than attract attention to it at all, overt action against intruders would be taken only in the last resort, and on irrefragable proofs of guilty intention.

Now for our clues. I had come away with two, each the germ of a distinct theory, and both obscured by the prevailing ambiguity. Now, however, as we thumbed the chart and I gave full rein to my fancy, one of them, the idea of Memmert, gained precision and vigour every moment. True, such information as we had about the French wreck and his own connection with it was placed most readily at our disposal by von Bruning; but I took it to be information calculated only to forestall suspicion, since he was aware that we already a.s.sociated him with Dollmann, possibly also with Grimm, and it was only likely that in the ordinary course we should learn that the trio were jointly concerned in Memmert. So much for the facts; as for the construction he wished us to put on them, I felt sure it was absolutely false. He wished to give us the impression that the buried treasure itself was at the root of any mystery we might have scented.

I do not know if the reader fully appreciated that astute suggestion--the hint that secrecy as to results was necessary owing both to the great sum at stake and the flaw in the t.i.tle, which he had been careful to inform us had pa.s.sed through British hands. What he meant to imply was, 'Don't be surprised if you have midnight visitors; Englishmen prowling along this coast are suspected of being Lloyd's agents.' An ingenious insinuation, which, at the time it was made, had caused me to contemplate a new and much more commonplace solution of our enigma than had ever occurred to us; but it was only a pa.s.sing doubt, and I dismissed it altogether now.

The fact was, it either explained everything or nothing. As long as we held to our fundamental a.s.sumption--that Davies had been decoyed into a death-trap in September--it explained nothing. It was too fantastic to suppose that the exigencies of a commercial speculation would lead to such extremities as that. We were not in the South Sea Islands; nor were we the puppets of a romance. We were in Europe, dealing not only with a Dollmann, but with an officer of the German Imperial Navy, who would scarcely be connected with a commercial enterprise which could conceivably be reduced to forwarding its objects in such a fashion. It was shocking enough to find him in relations with such a scoundrel at all, but it was explicable if the motive were imperial--not so if it were financial. No; to accept the suggestion we must declare the whole quest a mare's nest from beginning to end; the attempt on Davies a delusion of his own fancy, the whole structure we had built on it, baseless.

'Well,' I can hear the reader saying, 'why not? You, at any rate, were always a little sceptical.'

Granted; yet I can truthfully say I scarcely faltered for a moment.

Much had happened since Schlei Fiord. I had seen the mechanism of the death-trap; I had lived with Davies for a stormy fortnight, every hour of which had increased my reliance on his seamanship, and also, therefore, on his account of an event which depended largely for its correct interpretation on a balanced nautical judgement. Finally, I had been unconsciously realizing, and knew from his mouth to-day, that he had exercised and acted on that judgement in the teeth of personal considerations, which his loyal nature made overwhelming in their force.

What, then, was the meaning of Memmert? At the outset it riveted my attention on the Ems estuary, whose mouth it adjoins. We had always rather neglected the Ems in our calculations; with some excuse, too, for at first sight its importance bears no proportion to that of the three greater estuaries. The latter bear vessels of the largest tonnage and deepest draught to the very quays of Hamburg, Bremerhaven, and the naval dockyard of Wilhelmshaven; while two of them, the Elbe and the Weser, are commerce carriers on the vastest scale for the whole empire. The Ems, on the other hand, only serves towns of the second cla.s.s. A glance at the chart explains this. You see a most imposing estuary on a grander scale than any of the other three taken singly, with a length of thirty miles and a frontage on the North Sea of ten miles, or one-seventieth, roughly, of the whole seaboard; enc.u.mbered by outlying shoals, and blocked in the centre by the island of Bork.u.m, but presenting two fine deep-water channels to the incoming vessel. These roll superbly through enormous sheets of sand, unite and approach the mainland in one stately stream three miles in breadth. But then comes a sad falling off. The navigable fairway shoals and shrinks, middle grounds obstruct it, and shelving foresh.o.r.es persistently deny it that easy access to the land that alone can create great seaboard cities. All the ports of the Ems are tidal; the harbour of Delfzyl, on the Dutch side, dries at low water, and Emden, the princ.i.p.al German port, can only be reached by a lock and a mile of ca.n.a.l.

But this depreciation is only relative. Judged on its merits, and not by the standard of the Elbe, it is a very important river. Emden is a flourishing and growing port. For shallow craft the stream is navigable far into the interior, where, aided by tributaries and allied ca.n.a.ls (notably the connection with the Rhine at Dortmund, then approaching completion), it taps the resources of a great area.

Strategically there was still less reason for underrating it. It is one of the great maritime gates of Germany; and it is the westernmost gate, the nearest to Great Britain and France, contiguous to Holland.

Its great forked delta presents two yawning breaches in that singular rampart of islets and shoals which masks the German seaboard--a seaboard itself so short in proportion to the empire's bulk, that, as Davies used to say, 'every inch of it must be important'. Warships could force these breaches, and so threaten the mainland at one of its few vulnerable points. Quay accommodation is no object to such visitors; intricate navigation no deterrent. Even the heaviest battleships could approach within striking distance of the land, while cruisers and military transports could penetrate to the level of Emden itself. Emden, as Davies had often pointed out, is connected by ca.n.a.l with Wilhelmshaven on the Jade, a strategic ca.n.a.l, designed to carry gunboats as well as merchandise.

Now Memmert was part of the outer rampart; its tapering sickle of sand directly commanded the eastern breach; it _must_ be connected with the defence of this breach. No more admirable base could be imagined; self-contained and isolated, yet sheltered, accessible--better than Juist and Bork.u.m. And supposing it were desired to shroud the nature of the work in absolute secrecy, what a pretext lay to hand in the wreck and its buried bullion, which lay in the offing opposite the fairway!

On Memmert was the depot for the salvage operations. Salvage work, with its dredging and diving, offered precisely the disguise that was needed. It was submarine, and so are some of the most important defences of ports, mines, and dirigible torpedoes. All the details of the story were suggestive: the 'small local company'; the 'engineer from Bremen' (who, I wondered, was he?); the few shares held by von Bruning, enough to explain his visits; the stores and gear coming from Wilhelmshaven, a naval dockyard.

Try as I would I could not stir Davies's imagination as mine was stirred. He was bent on only seeing the objections, which, of course, were numerous enough. Could secrecy be ensured under pretext of salving a wreck? It must be a secret shared by many--divers, crews of tugs, employees of all sorts. I answered that trade secrets are often preserved under no less difficult conditions, and why not imperial secrets?

'Why the Ems and not the Elbe?' he asked.

'Perhaps,' I replied, 'the Elbe, too, holds similar mysteries.'

Neuerk Island might, for all we knew, be another Memmert; when cruising in that region we had had no eyes for such things, absorbed in a preconceived theory of our own. Besides, we must not take ourselves too seriously. We were amateurs, not experts in coast defence, and on such vague grounds to fastidiously reject a clue which went so far as this one was to quarrel with our luck. There was a disheartening corollary to this latter argument that in my new-born zeal I shut my eyes to. As amateurs, were we capable of using our clue and gaining exact knowledge of the defences in question? Davies, I knew, felt this strongly, and I think it accounted for his lukewarm view of Memmert more than he was aware. He clung more obstinately than ever to his 'channel theory', conscious that it offered the one sort of opportunity of which with his peculiar gifts he was able to take advantage. He admitted, however, that it was under a cloud at present, for if knowledge of the coastwise navigation were a crime in itself we should scarcely be sitting here now. 'It's something to do with it, anyhow!' he persisted.

XVIII. Imperial Escort

MEMMERT gripped me, then, to the exclusion of a rival notion which had given me no little perplexity during the conversation with von Bruning. His reiterated advice that we should lose no time in picking up our anchor and chain had ended by giving me the idea that he was anxious to get us away from Bensersiel and the mainland. At first I had taken the advice partly as a test of our veracity (as I gave the reader to understand), and partly as an indirect method of lulling any suspicions which Grimm's midnight visit may have caused. Then it struck me that this might be over-subtlety on my part, and the idea recurred when the question of our future plans cropped up, and hampered me in deciding on a course. It returned again when von Bruning offered to tow us out in the evening. It was in my mind when I questioned him as to his business ash.o.r.e, for it occurred to me that perhaps his landing here was not solely due to a wish to inspect the crew of the 'Dulcibella'. Then came his perfectly frank explanation (with its sinister _double entente_ for us), coupled with an invitation to me to accompany him to Esens. But, on the principle of _'tinieo Danaos'_ etc., I instantly smelt a ruse, not that I dreamt that I was to be decoyed into captivity; but if there was anything here which we two might discover in the few hours left to us, it was an ingenious plan to remove the most observant of the two till the hour of departure.

Davies scorned them, and I had felt only a faint curiosity in these insignificant hamlets, influenced, I am afraid, chiefly by a hankering after _terra firma_ which the pitiless rigour of his training had been unable to cure.

But it was imprudent to neglect the slightest chance. It was three o'clock, and I think both our brains were beginning to be addled with thinking in close confinement. I suggested that we should finish our council of war in the open, and we both donned oilskins and turned out. The sky had hardened and banked into an even canopy of lead, and the wind drove before it a fine cold rain. You could hear the murmur of the rising flood on the sands outside, but the harbour was high above it still, and the 'Dulcibella' and the other boats squatted low in a bed of black slime. Native interest seemed to be at last a.s.suaged, for not a soul was visible on the bank (I cannot call it a quay); but the top of a black sou'wester with a feather of smoke curling round it showed above the forehatch of the 'Kormoran'.

'I wish I could get a look at your cargo, my friend,' I thought to myself.

We gazed at Bensersiel in silence.

'There can't be anything _here_?' I said.

'What _can_ there be?' said Davies.

'What about that d.y.k.e?' I said, with a sudden inspiration.

From the bank we could see all along the coast-line, which is d.y.k.ed continuously, as I have already said. The d.y.k.e was here a substantial brick-faced embankment, very similar, though on a smaller scale, to that which had bordered the Elbe near Cuxhaven, and over whose summit we had seen the snouts of guns.

'I say, Davies,' I said, 'do you think this coast could be invaded?

Along here, I mean, behind these islands?'

Davies shook his head. 'I've thought of that,' he said. 'There's nothing in it. It's just the very last place on earth where a landing would be possible. No transport could get nearer than where the Blitz is lying, four miles out.'

'Well, you say every inch of this coast is important?'

'Yes, but it's the _water_ I mean.'

'Well, I want to see that d.y.k.e. Let's walk along it.'

My mushroom theory died directly I set foot on it. It was the most innocent structure in the world--like a thousand others in Ess.e.x and Holland--topped by a narrow path, where we walked in single file with arms akimbo to keep our balance in the gusts of wind. Below us lay the sands on one side and rank fens on the other, interspersed with squares of pasture ringed in with ditches. After half a mile we dropped down and came back by a short circuit inland, following a mazy path--which was mostly right angles and minute plank bridges, till we came to the Esens road. We crossed this and soon after found our way barred by the stream I spoke of. This involved a _detour_ to the bridge in the village, and a stealthy avoidance of the post-office, for dread of its garrulous occupant. Then we followed the d.y.k.e in the other direction, and ended by a circuit over the sands, which were fast being covered by the tide, and so back to the yacht.

n.o.body appeared to have taken the slightest notice of our movements.

As we walked we had tackled the last question, 'What are we to do?'

and found very little to say on it. We were to leave to-night (unless the Esens police appeared on the scene), and were committed to sailing direct to Norderney, as the only alternative to duck shooting under the espionage of a 'trustworthy' nominee of von Bruning's.

Beyond that--vagueness and difficulty of every sort.

At Norderney I should be fettered by my letter. If it seemed to have been opened and it ordered my return, I was limited to a week, or must risk suspicion by staying. Dollmann was away (according to von Bruning), 'would probably be back soon'; but how soon? Beyond Norderney lay Memmert. How to probe its secret? The ardour it had roused in me was giving way to a mortifying sense of impotence. The sight of the 'Kormoran', with her crew preparing for sea, was a pointed comment on my diplomacy, and most of all on my ridiculous survey of the d.y.k.es. When all was said and done we were _proteges_ of von Bruning, and dogged by Grimm. Was it likely they would let us succeed?

The tide was swirling into the harbour in whorls of chocolate froth, and as it rose all Bensersiel, dominated as before by Herr Schenkel, straggled down to the quay to watch the movements of shipping during the transient but momentous hour when the mud-hole was a seaport. The captain's steam-cutter was already afloat, and her sailors busy with sidelights and engines. When it became known that we, too, were to sail, and under such distinguished escort, the excitement intensified.

Again our friend of the customs was spreading out papers to sign, while a throng of helpful Frisians, headed by the twin giants of the post-boat, thronged our decks and made us ready for sea in their own confused fashion. Again we were carried up to the inn and overwhelmed with advice, and warnings, and farewell toasts. Then back again to find the 'Dulcibella' afloat, and von Bruning just arrived, cursing the weather and the mud, chaffing Davies, genial and _debonnaire_ as ever.

'Stow that mainsail, you won't want it,' he said. 'I'll tow you right out to Spiekeroog. It's your only anchorage for the night in this wind--under the island, near the Blitz, and that would mean a dead beat for you in the dark.'

The fact was so true, and the offer so timely, that Davies's faint protests were swept aside in a torrent of ridicule.

'And now I think of it,' the commander ended, 'I'll make the trip with you, if I may. It'll be pleasanter and drier.'

We all three boarded the 'Dulcibella', and then the end came. Our tow-rope was attached, and at half-past six the little launch jumped into the collar, and amidst a demonstration that could not have been more hearty if we had been amba.s.sadors on a visit to a friendly power, we sidled out through the jetties.

It took us more than an hour to cover the five miles to Spiekeroog, for the 'Dulcibella' was a heavy load in the stiff head wind, and Davies, though he said nothing, showed undisguised distrust of our tug's capacities. He at once left the helm to me and flung himself on the gear, not resting till every rope was ready to hand, the mainsail reefed, the binnacle lighted, and all ready for setting sail or anchoring at a moment's notice. Our guest watched these precautions with infinite amus.e.m.e.nt. He was in the highest and most mischievous humour, raining banter on Davies and mock sympathy on me, laughing at our huge compa.s.s, heaving the lead himself, startling us with imaginary soundings, and doubting if his men were sober. I offered entertainment and warmth below, but he declined on the ground that Davies would be tempted to cut the tow-rope and make us pa.s.s the night on a safe sandbank. Davies took the raillery unmoved. His work done, he took the tiller and sat bareheaded, intent on the launch, the course, the details, and chances of the present. I brought up cigars and we settled ourselves facing him, our backs to the wind and spray. And so we made the rest of the pa.s.sage, von Bruning cuddled against me and the cabin-hatch, alternately shouting a jest to Davies and talking to me in a light and charming vein, with just that shade of patronage that the disparity in our ages warranted, about my time in Germany, places, people, and books I knew, and about life, especially young men's life, in England, a country he had never visited, but hoped to; I responding as well as I could, striving to meet his mood, acquit myself like a man, draw zest instead of humiliation from the irony of our position, but scarcely able to make headway against a numbing sense of defeat and incapacity. A queer thought was haunting me, too, that such skill and judgement as I possessed was slipping from me as we left the land and faced again the rigours of this exacting sea. Davies, I very well knew, was under exactly the opposite spell--a spell which even the reproach of the tow-rope could not annul. His face, in the glow of the binnacle, was beginning to wear that same look of contentment and resolve that I had seen on it that night we had sailed to Kiel from Schlei Fiord.

Heaven knows he had more cause for worry than I--a casual comrade in an adventure which was peculiarly his, which meant everything on earth to him; but there he was, washing away perplexity in the salt wind, drawing counsel and confidence from the unfailing source of all his inspirations--the sea.

'Looks happy, doesn't he?' said the captain once. I grunted that he did, ashamed to find how irritated the remark made me.

'You'll remember what I said,' he added in my ear.

'Yes,' I said. 'But I should like to see her. What is she like?'

'Dangerous.' I could well believe it.

The hull of the Blitz loomed up, and a minute later our kedge was splashing overboard and the launch was backing alongside.