In our eagerness, Roseye and I set out to walk towards the pole, leaving
Teddy in charge of the apparatus.
To approach the spot, we had to leave the market-garden and take a road
lined by meagre cottages, then at last, skirting two orchards and yet
another market-garden, we came out upon a second road, which we crossed,
and at last found ourselves at the disused wireless-hut.
There a strange spectacle greeted our eyes for, the darkness having by
that time become complete, we saw, around the lightning-conductor on the
pole and over the steel stays, blue electric sparks scintillating.
"Look, darling!" I cried. "See what we have at last produced by the
unseen directive current!"
"Yes," replied my well-beloved. "Look at the sparks! How pretty they
are! Why--they seem to be jumping across the insulators from one
stretch of wire-rope to the other!"
"That effect is exactly what Teddy and I have for so long laboured to
produce," was my answer, as I stood there fascinated by the sparks and
the slight crackling which reached our ears where we stood.
The fact was that though our apparatus was half a mile away, yet upon
those steel strands, as well as upon the copper lightning-conductor, the
electric waves which we were discharging--a new development of the
discovery of Heinrich Hertz--was such as to spark over all the
intervening gaps, even though the space where the insulators were
inserted was quite three inches.
It was a phenomenon such as had never before been witnessed by any
experimenter in electricity. The theories I had formed and so often
discussed with Teddy were now proved to be quite sound, for they had
resulted in the construction of that apparatus which must, I knew, be
most deadly to any Zeppelin.
The sparks, as we watched them, suddenly ceased.
For a moment I stood surprised, yet next instant realised that Teddy
had, no doubt, some very good reason for stopping the engine. Somebody
might have come upon the scene, and we were always extremely cautious
that nobody should know in what we were engaged. The neighbours knew us
as airmen, and believed we were engaged in making some kind of new
propellers.
What I had seen in those few minutes, the flashing crackling sparks
running over the surface of those porcelain insulators and, indeed, over
part of the wooden pole--for it happened to have been raining until an
hour before, and all the surfaces were damp--was, to me, sufficient to
cause me to hold my breath in excitement.
"We have made a great and most important discovery to-day, Roseye," I
said as calmly as I could, as together we walked back to the shed.
"This discovery is undreamed of by Germany. It will give us power over
any Zeppelin which dares to come to our shores, providing that we can
approach sufficiently near."
"Ah! if you can," replied the girl at my side. "No doubt we shall
increase the range," I replied. "We have, this evening, established the
one most important fact that our apparatus is really capable of
directing the rays, and that between metal and metal we can now, as
Hertz endeavoured to, set up an electric spark from a distance."
"You 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 afire at all four of her corners."
"That's just what we intend to prevent," I declared very emphatically.
"That is what, notwithstanding the efforts of prowling strangers who are
seeking to know in what direction our experiments are being conducted,
we intend to achieve. To-night, Roseye, we have made one great and
astounding discovery--a discovery which has placed within our hands a
power which Germany, with all her science and investigation, little
dreams. We now know the true secret which will eventually prove the
undoing of the Kaiser and his barbarous hordes."
"Yes, dear," was my well-beloved's reply. "At all hazards, no spy of
Germany must be allowed to wrest this secret from us."
"But they are clever--devilishly cunning and entirely unscrupulous. The
Invisible Hand, well provided with money, lurks everywhere, ready to
grasp what it can in the interest of our octopus enemies," I declared
warningly. "Therefore let us be ever on the alert--ever watchful and
mindful, in order to avert the relentless talons with which this unknown
and Invisible Hand is furnished."