Colston shook his head, saying —
“No, no, my friend, we must have a little more diplomacy than that. Your thirst for the life of the enemy will, no doubt, be fully gratified later on. Besides, you must remember that you would probably blow some hundreds of perfectly innocent people to pieces, and very possibly a good many friends of the Cause among them.”
“True,” replied Arnold; “I didn’t think of that; but I’ll tell you what we can do, if you like, without transgressing our instructions or hurting any one except the soldiers of the Tsar, who, of course, are paid to slaughter and be slaughtered, and so don’t count.”
“What is that?” asked Colston.
“We shall be passing over Kronstadt in a little over an hour, and we might take the opportunity of showing his Majesty the Tsar what the Ariel can do with the strongest fortress in Europe. How would you like to fire the first shot in the war of the Revolution?”
Colston was silent for a few moments, and then he looked up and said —
“There is not the slightest reason why we should not take a shot at Kronstadt, if only to give the Russians a foretaste of favours to come. Still, I won’t fire the first shot on any account, simply because that honour belongs to you. I’ll fire the second with pleasure.”
“Very good,” replied Arnold. “We’ll have two shots apiece, one each as we approach the fortress, and one each as we leave it. Now come and take a preparatory lesson in the new gunnery.”
They went down into the chief saloon, and there Arnold showed Colston a model of the new weapon with which the Ariel was armed, and thoroughly explained the working of it. After this they went to the wheel-house, where Arnold inclined the planes at a sharper angle, and sent the Ariel flying up into the sky, until the barometer showed an elevation of three thousand feet.
Then he signalled to the engine-room, the fan-wheels rose from the deck, as if by their own volition, and, as soon as they reached their places, began to spin round faster and faster, until Colston could again hear the high-pitched singing sound that he had heard as the Ariel rose from Drumcraig Island.
At the same time the speed of the vessel rapidly decreased; the side propellers ceased working, and the stern-screw revolved more and more slowly, until the speed came down to about thirty miles an hour.
By this time the great fortress of Kronstadt could be distinctly seen lying upon its island, like some huge watch-dog crouched at the entrance to his master’s house, guarding the way to St. Petersburg.
“Now,” said Arnold, “we can go outside without any fear of being blown off into space.”
They went out and walked forward to the bow. Arrived there they found two of the men, each with a curious-looking shell in his arms. The projectiles were about two feet long and six inches in diameter, and were, as Arnold told Colston, constructed of papier-maché. There were three blades projecting from the outside, and running spirally from the point to the butt. These fitted into grooves in the inside of the cannon, which were really huge air-guns twenty feet long, including the air-chamber at the breech.
The projectiles were placed in position, the breeches of the guns closed, and a minute later the air-chambers were filled with air at a pressure of two hundred atmospheres, pumped from the forward engines through pipes leading up to the guns for the purpose.
“Now,” said Arnold, “we’re ready! Meanwhile you two can go and load the two after guns.”
The men saluted and retired, and Arnold continued —
“Just take a look down with your glasses and see if they see us. I expect they do by this time.”
Colston put his field-glass to his eyes, and looked down at the fortress, which was now only six or seven miles ahead.
“Yes,” he said, “at any rate I can see a lot of little figures running about on the roof of one of the ramparts, which I suppose are soldiers. What’s the range of your gun? I should say the fortress is about six miles off now.”
“We can hit it from here, if you like,” replied Arnold, “and if we were a thousand feet higher I could send a shell into Petersburg. See! there is the City of Palaces. Away yonder in the distance you can just see the sun shining on the houses. We could see it quite plainly if it wasn’t for the haze that seems to be lying over the Neva.”
While he was speaking, Arnold trained the gun according to a scale on a curved steel rod which passed through a screw socket in the breech of the piece.
“Now,” he said. “Watch!”
He pressed a button on the top of the breech. There was a sharp but not very loud sound as the compressed air was released; something rushed out of the muzzle of the gun, and a few seconds later, Colston could see the missile boring its way through the air, and pursuing a slanting but perfectly direct path for the centre of the fortress.
A second later it struck. He could see a bright greenish flash as it smote the steel roof of the central fort. Then the fort seemed to crumble up and dissolve into fragments, and a few moments later a dull report floated up into the sky mingled, as he thought, with screams of human agony.
For a moment he stared in silence through the glasses, then he turned to Arnold and said in a voice that trembled with violent emotion —
“Good God, that is awful! The whole of the centre citadel is gone as though it had been swept off the face of the earth. I can hardly see even the ruins of it. Surely that’s murder rather than war!”
“No more murder than the use of torpedoes in naval warfare, as far as I can see,” replied Arnold coolly. “Remember, too,” he continued in a sterner tone, “that fortress belongs to the power that flogged Radna and has captured Natasha. Come, let’s see what execution you can do.”
He crossed the deck and set the other gun by its scale, saying as he did so —
“Put your finger on the button and press when I tell you.”
Colston did as he was bid, and as his finger touched the little knob his hand was as firm as though he had been making a shot at billiards.
“Now!”
He pressed the button down hard. There was the same sharp sound, and a second messenger of destruction sped on its way towards the doomed fortress.
They saw it strike, and then came the flash, and after that a huge cloud of dust mingled with flying objects that might have been blocks of masonry, guns, or human bodies, rose into the air, and then fell back again to the earth.
“There goes one of the angles of the fortification into the sea,” said Arnold, as he saw the effects of the shot. “Kronstadt won’t be much good when the war breaks out, it strikes me. I suppose they’ll be replying soon with a few rifle shots. We’d better quicken up a bit.”
He went aft to the wheel-house, followed by Colston, and signalled for the three propellers to work at their utmost speed. The order was instantly obeyed; the fan-wheels ceased revolving, and under the impetus of her propellers the Ariel leapt forwards and upwards like an eagle on its upward swoop, rose five hundred feet in the air, and then swept over Kronstadt at a speed of more than a hundred miles an hour.
As they passed over they saw a series of flashes rise from one of the untouched portions of the fortress, but no bullets came anywhere near them. In fact, they must have passed through the air two or three miles astern of the flying Ariel. No soldier who ever carried a rifle could have sent a bullet within a thousand yards of an object seventy feet long travelling over a hundred miles an hour at a height of nearly four thousand feet, and so the Russians wasted their ammunition.
As soon as they had passed over the fortress, Arnold signalled for the propellers to stop, and the fan-wheels to revolve again at half speed.