Part 29 (1/2)

By nine o'clock the moon was high in the heavens. At that hour the fan-wheels of the little squadron rose from the decks, and at a signal from Arnold began to revolve. The three vessels ascended quietly into the air amidst the cheers and farewells of the colonists, and in single file pa.s.sed slowly down the beautiful valley bathed in the brilliant moonlight. One by one they disappeared through the defile that led to the outer world, and, once clear of the mountains, the _Ithuriel_, with one of her consorts on either side, headed away due north at the speed of a hundred miles an hour.

CHAPTER XXVII.

ON THE TRACK OF TREASON.

The _Ithuriel_ and her consorts crossed the northern coast of Africa soon after daybreak on the 27th, in the longitude of Alexandria, at an elevation of nearly 4000 feet. From thence they pursued almost the same course as that steered by the deserters, as Natas had rightly judged that they would first make for Russia, probably St.

Petersburg, and there hand the air-s.h.i.+p over to the representatives of the Tsar.

There was, of course, another alternative, and that was the supposition that they had stolen the _Lucifer_--the ”fallen Angel,”

as Natasha had now re-named her--for purposes of piracy and private revenge; but that was negatived by the fact that Tamboff knew that he only had a certain supply of motive power which he could not renew, and which, once exhausted, left his air-s.h.i.+p as useless as a steamer without coal. His only reasonable course, therefore, would be to sell the vessel to the Tsar, and leave his Majesty's chemists to discover and renew the motive power if they could.

These conclusions once arrived at, it was an easy matter for the keen and subtle intellect of Natas to deduce from them almost the exact sequence of events that had actually taken place. The _Lucifer_ had a sufficient supply of power-cylinders and sh.e.l.ls for present use, and these would doubtless be employed at once by the Tsar, who would trust to his chemists and engineers to discover the nature of the agents employed.

For this purpose it would be absolutely necessary for him to give them one or two of the sh.e.l.ls, and at least two of the spare power-cylinders as subjects for their experiments.

Now Natas knew that if there was one man in Russia who could discover the composition of the explosives, that man was Professor Volnow of the Imperial a.r.s.enal Laboratory, and therefore the sh.e.l.ls and cylinders would be sent to him at the a.r.s.enal for examination. The whereabouts of the deserters for the present mattered nothing in comparison with the possible discovery of the secret on which the whole power of the Terrorists depended.

That once revealed, the sole empire of the air was theirs no longer.

The Tsar, with millions of money at his command, could very soon build an aerial fleet, not only equal, but, numerically at least, vastly superior to their own, and this would practically give him the command of the world.

Natas therefore came to the conclusion that no measures could be too extreme to be justified by such a danger as this, and so, after a consultation with the commanders of the three vessels, it was decided to, if necessary, destroy the a.r.s.enal at St. Petersburg, on the strength of the reasoning that had led to the logical conclusion that within its precincts the priceless secret either might be or had already been discovered.

As the crow flies, St. Petersburg is thirty degrees of lat.i.tude, or eighteen hundred geographical miles, north of Alexandria, and this distance the _Ithuriel_ and her consorts, flying at a speed of a hundred and twenty miles an hour, traversed in fifteen hours, reaching the Russian capital a few minutes after seven on the evening of the 27th.

The Rome of the North, basking in the soft evening sunlight of the incomparable Russian summer, lay vast and white and beautiful on the islands formed by the Neva and its ten tributaries; its innumerable palaces, churches, and theatres, and long straight streets of stately houses, its parks and gardens, and its green shady suburbs, making up a picture which forced an exclamation of wonder from Arnold's lips as the air-s.h.i.+ps slowed down and he left the conning-tower of the _Ithuriel_ to admire the magnificent view from the bows. They pa.s.sed over the city at a height of four thousand feet, and so were quite near enough to see and enjoy the excitement and consternation which their sudden appearance instantly caused among the inhabitants. The streets and squares filled in an inconceivably short s.p.a.ce of time with crowds of people, who ran about like tiny ants upon the ground, gesticulating and pointing upwards, evidently in terror lest the fate of Kronstadt was about to fall upon St. Petersburg.

The experimental department of the a.r.s.enal had within the last two or three years been rebuilt on a large s.p.a.ce of waste ground outside the northern suburbs, and to this the three air-s.h.i.+ps directed their course after pa.s.sing over the city. It was a ma.s.sive three-storey building, built in the form of a quadrangle. The three air-s.h.i.+ps stopped within a mile of it at an elevation of two thousand feet. It had been decided that, before proceeding to extremities, which, after all, might still leave them in doubt as to whether or not they had really destroyed all means of a.n.a.lysing the explosives, they should make an effort to discover whether Professor Volnow had received them for experiment, and, if so, what success he had had.

Mazanoff had undertaken this delicate and dangerous task, and so, as soon as the _Ithuriel_ and the _Orion_ came to a standstill, and hung motionless in the air, with all their guns ready trained on different parts of the building, the _Ariel_ sank suddenly and swiftly down, and stopped within forty feet of the heads of a crowd of soldiers and mechanics, who had rushed pell-mell out of the building, under the impression that it was about to be destroyed.

The bold manuvre of the _Ariel_ took officers and men completely by surprise. So intense was the terror in which these mysterious air-s.h.i.+ps were held, and so absolute was the belief that they were armed with perfectly irresistible means of destruction, that the sight of one of them at such close quarters paralysed all thought and action for the time being. The first shock over, the majority of the crowd took to their heels and fled incontinently. Of the remainder a few of the bolder spirits handled their rifles and looked inquiringly at their officers. Mazanoff saw this, and at once raised his hand towards the sky and shouted--

”Ground arms! If a shot is fired the a.r.s.enal will be destroyed as Kronstadt was, and then we shall attack Petersburg.”

The threat was sufficient. A grey-haired officer in undress uniform glanced up at the _Ithuriel_ and her consort, and then at the guns of the _Ariel_, all four of which had been swung round and brought to bear on the side of the building near which she had descended. He was no coward, but he saw that Mazanoff had the power to do what he said, and that even if this one air-s.h.i.+p were captured or destroyed, the other two would take a frightful vengeance. He thought of Kronstadt, and decided to parley. The rifle b.u.t.ts had come to the ground before Mazanoff had done speaking.

”Order arms, and keep silence!” said the officer, and then he advanced alone from the crowd and said--

”Who are you, and what is your errand?”

”Alexis Mazanoff, late prisoner of the Tsar, and now commander of the Terrorist air-s.h.i.+p _Ariel_. I have not come to destroy you unless you force me to do so, but to ask certain questions, and demand the giving up of certain property delivered into your hands by deserters and traitors.”

”What are your questions?”

”First, is Professor Volnow in the building?”

”He is.”