"But before I say anything more about Karl von Harburg," continued the Captain, "I must mention another incident. The concession I had acquired paid beyond all expectations, for not only were copper and tin found in abundance but also gold. We were all rich men. Some of my workmen went back to Redruth; others, having no home ties, and liking the free open life, stayed on. Since I was naturally fond of electrical engineering and the allied sciences, I spent a great deal of my time experimenting. One day, almost by accident, I discovered an alloy--as light as aluminium, absolutely showing no traces of corrosion when exposed to the action of salt water, as proof against acids as pure gold, and possessing the strength and resilience of steel. It was also as non-porous as a metal can possibly be. Under pressure that would cause water to 'weep' through a steel vessel, a cylinder made of this metal showed no sign of moisture. I realized that I had made a discovery that would prove of inestimable value in the construction of air-ships, and as at that time the Admiralty were 'tied up in knots' over the utter failure of the naval airship 'Mayfly,' I sent a sheet of the metal to a trusted agent in London with instructions to submit it to My Lords.
"Believe me from that day to this, beyond a curt acknowledgment and a bald statement that the subject was under consideration, I have heard nothing further of the matter. I was angry--disgusted because the powers that be had bluntly shut their eyes to an actual discovery that would give Great Britain the command of the air.
"Since airmanship did not appeal to me I resolved to make use of my discovery in another direction. By further experiments I found that my metal 'Restronium,' I have been ambitious enough to call it, could be made capable of absorbing bright light, yet at close distance would act as a reflector. The result was that I devised a submarine, steel-clad, and cased with restronium. It was constructed by native workmen under the supervision of my comrades and myself.
"The craft was a success. It prompted me to attempt another on a more ambitious scale, but ere it was completed Karl von Harburg appeared on the scene.
"This fellow is as crafty as a rogue can possibly be. By his German co-colonists he was cordially hated. He had ability but was lazy. His factory did not do so well as the others; instead of working harder he sulked. In the Fatherland he had once held a high diplomatic position. He it was who a few years back tried to force a quarrel upon Holland in order that a pretext might be found for Germany to acquire a longer coast-line on the shores of the North Sea. He failed, and since failure is not tolerated in Teutonic diplomatic circles, he was disgraced. He came to Sumatra, ostensibly with the idea of working a concession, but in reality looking for an opportunity of recovering his lost prestige by smoothing the way for a German annexation of the Dutch East Indies. Again he failed--how and why I need not now mention; but rightly or wrongly he formed the idea that I had a say in the matter.
"He had his revenge. He stole the secret of my new alloy. He obtained possession of the plans of my latest submarine, the 'Aphrodite,' and set himself to build a vessel that would be more powerful than mine. But he had not mastered one important idea--the secret of the defensive and offensive powers of my vessel.
"It was a case of war to the knife. His idea was to take his submarine--the 'Vorwartz' he named her--into British waters and deliberately do as much destruction to British ships of war and merchantmen as he possibly could; this with the idea of giving the Fatherland an advantage in the coming naval war that has been so long anticipated and which has not yet, thank God, caused untold misery and disaster to two nations who could be rivals yet friends.
"That is where I stepped in. I sent word and told the fellow plainly that the 'Aphrodite' was also bound for British waters, and that I would take the first opportunity of smashing up the 'Vorwartz' should one hostile act be committed against British property. That frightened him, for at heart he is a coward. Accordingly Karl von Harburg, knowing that the 'Aphrodite' had left for the Atlantic, concocted a truly diabolical plot. He deliberately navigated his 'Vorwartz' to German waters and committed outrages against his own country."
"Whatever for?" asked the Sub. "It is inconceivable."
"To a Briton, yes!" assented Captain Restronguet. "But Karl von Harburg had no compunction. He had a spite against his Government, he had a grudge against me; and whatever the issue he had nothing to lose by being the means of a terrible conflict between Great Britain and Germany. Thus he impersonated me, and by committing these outrages upon the German fleet and harbours he very nearly provoked the war he wished to engineer.