LITMIR.BIZ

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certainly have done that – but I don’t yet see the trend of your argument, Claude. I know I’m only a woman and unversed in technicalities, so please forgive me, won’t you?”

      “Well,” I said as we walked, my arm linked in hers. “First, as you know, a Zeppelin is constructed mostly of aluminium, its stays and practically all its rigid parts are of that metal except some of light steel. It consists of a number of ballonets filled with highly inflammable gas, and around those ballonets are ribs of aluminium and steel. There must be joints in these ribs, and over those joints we have now proved that we can create sparks from a considerable distance. From the ballonets there is a constant leakage of gas, therefore if we charge the aluminium and steel so that they spark wherever there is the slightest gap we shall ignite that escaping gas and cause the whole airship to explode with terrific force. Do I explain it clearly?”

      “Quite, Claude,” was her slow, thoughtful reply. “I see now in what direction all these wonderful and patient experiments have been made. To-night you have certainly produced sparks.”

      “And ere long I hope we shall increase our range, and be able to do without half the current and all its consequent paraphernalia,” was my confident reply. “I’m certain,” I said, “as certain as we are walking here together, that we have at last established a sound means of protecting Great Britain against Zeppelin raids.”

      “I hope you have, dear,” Roseye replied. “Oh! what a great thing it will be for the country. You and Teddy will deserve monuments – if you really can succeed.”

      “We shall succeed, darling – with your assistance. I’m confident of that!”

      “I – how can I help?”

      “In many ways. You’ve already assisted us enormously,” I said. “Teddy was only saying so to-day,” and I gripped her arm more tightly, as we turned the corner and approached the shed where Ashton was, we knew, awaiting us.

      “Splendid, my dear fellow!” I cried as we re-entered. “Sparking beautifully, all over – like fireworks!”

      “Pretty dangerous fireworks!” my friend remarked. “I cut off the current just now.”

      “Yes,” I said. “Why?”

      “Well, do you know, old chap, I thought I heard somebody about!” he replied. “Even with the dynamo running I fancied I overheard voices. Therefore I cut off at once, and went outside to see. Strangers seemed to be somewhere at the back.”

      “Did you find anyone?” Roseye asked.

      “Nobody – yet I’m quite certain I heard voices,” he insisted.

      “Some of the men from the market-garden perhaps,” I remarked.

      “I don’t think so,” was Teddy’s reply.

      “Why not?” I demanded in surprise.

      “Well – because what I heard – and I tell you, Claude, I heard it quite distinctly – was a sudden exclamation of surprise.”

      “Surprise!”

      “Yes. As though somebody had made an unexpected discovery,” Teddy said. “I had just been watching the effect on the pole through your glasses, and had returned inside when I heard an exclamation, followed by some quick words of surprise that I could not catch. It was a man’s voice.”

      “Surely there could not be anybody else watching the sparking upon the pole!” I exclaimed in quick apprehension.

      “That’s just what I believe has happened,” Ashton replied seriously. “We’ve been watched – as I suspected we were.”

      “You’ve said so all along, I know.”

      “And now I’m quite convinced of it. And whoever has watched us making our experiments now knows that to-night our efforts have been crowned with success.”

      “Well,” I remarked after a pause. “If what you say is true, Teddy, we shall have to be very wary in future. I know there are a great many unscrupulous persons who would be ready to go to any length in order to learn this secret discovery of ours which, when fully developed, will, I feel convinced, mean the buckling-up of the Zeppelin menace.”

      “That’s quite true, Claude,” Roseye declared. “At Hendon and elsewhere there are, I know, a number of men intensely jealous of your success, and of the one or two ideas which you have patented, and which are now adopted in the construction of our military aeroplanes.”

      “It’s really astonishing how many enemies one makes quite unintentionally!” declared Teddy, leaning against the bench. “Claude has more than I have, I believe – and I never disguise from myself that I’ve got a really fine crop.”

      “Only the other day, when Lionel dined with us, he was speaking to dad about spies,” Roseye said. “He told us that he felt sure that we had men in our air-service who sent every new development and idea to Germany. Do you think that’s really a fact?”

      “A fact!” I echoed. “Why, dearest, of course it is! We’ve seen the result of it many times. As soon as we had that integral propeller the Germans knew, and copied us; the secret of Jack Pardon’s new dope was known in a few days, and the enemy are using it on every one of their machines to-day. Nothing is secret from those brutes.”

      “But who does all this?” asked Roseye.

      “Why, what I call the Invisible Hand,” was my reply. “The Invisible Hand was established in our midst in about 1906, when the Kaiser sat down and craftily prepared for war. He saw himself faced by the problem of the great British power and patriotism, and knew that the Briton would fight every inch for his liberty. Therefore the All-Highest Hun – the man who will be held up to universal damnation for all time – proceeded to adopt towards us the principle of dry-rot in wood. He started a system of sending slowly, but very surely, his insect-sycophants to burrow into the beam of good British oak which had hitherto supported our nation. That beam, to-day, is riddled by these Teutonic worms – insects which, like the book-worm, are never seen, yet, directed by the Invisible Hand, are only known by their works.”

      “Then you think there really are spies at Hendon?”

      “Of that I’m quite certain,” was my reply. “We all know that there are spies at every aerodrome – while in the higher ranks those who control our air-services, though patriotic enough, seem to suffer by reason of the still higher control which divides responsibility.”

      “Have any spies been lurking about here to-night?” asked Roseye very anxiously.

      “That is my firm conviction,” was Teddy’s reply to her. “I believe that there have been two strangers here. One was, perhaps, gazing through his glasses at the pole and, seeing in the darkness the sparking over the insulators set in the steel guys, ejaculated the natural expression of surprise that I overheard. But they got away noiselessly, and all my search failed to discover them.”

      “Well – we must be very wary, my dear Teddy,” I repeated. “They must not get at this secret of ours, otherwise from the gondola of a Zeppelin they will be able to use the invisible force against any of our aeroplanes in a stronger and greater degree than we could ever hope to do it. Then we ourselves would be destroyed by the secret power we have invented.”

      “They shall never know the secret from me,” was my friend’s fierce reply. “Only we three know it – while Theed has, of course, learnt something. That could, not be helped.”

      “We must not forget the words I read out to you the other day from the Berliner Tageblatt,” I replied. “That paper said: ‘The fires and devastation caused by our Zeppelin squadron in England represented a victory greater and more important than could be achieved in a single battle.’ That,” I added, “is the triumphant boast of Major Moraht, Germany’s most prominent military critic.”

      “Yes, and it went further,” exclaimed Teddy, turning to Roseye. “The paper declared that if the Germans were as brutal as they were accused of being, their naval airship squadron could long ago, in memory of the Baralong, have set London

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