"Ach, wohl, mein herr!" the German ober-lieutenant in the submarine was remarking to his superior officer at that moment. "The verdomt transports are gone, and there's nothing but a big 'hospital ship steaming by. Shall we loose a leetle tin fish at her? You can't trust these English; they're probably transporting materials of war. There are sure to be some staff officers on her decks anyhow. What say you, mein herr?"
"Sink the blamed hooker, Fritz! We can say that she tried to ram us, when we make out our report. No one will be any the wiser, for dead men can't tell tales. He, he! Ho, ho!"
And already the commander's hand was upon the lever in the conning-tower which controlled the torpedo tubes in the bow. Hesitating just for a second, as though battling with the last shreds of a lingering conscience, he pulled the lever.
"Swiss-s-s-h!" came the sound as the deadly missile left the tube and entered the water.
"Good heavens! She's fired!" exclaimed both the aviators, as, in the very middle of a dangerous nose dive they saw what had transpired, and followed for an instant, even in that downward dive, the wake of the deadly torpedo.
Fortunately, at that very moment the captain of the Galicia, the big four-funnelled boat, having had his attention attracted to the spot by the nose-dive of the warplane, saw the periscope of the enemy's submarine, and, starboarding his helm, swung the huge vessel just sufficiently to port for the first torpedo to miss his stern by a few feet.
Then commenced a stern chase, for the Galicia, seeing the imminent danger that she was in, sought refuge in flight. Placing her stern towards the oncoming submarine, she fled down Channel, hoping thereby to save her precious cargo of wounded heroes.
"Donner and blitz!" exclaimed the commander to his lieutenant. "We have missed her. That will never do. We must sink her now at any cost, or the American cables will be full of the affair, and the anger of the neutral world will be turned against us once more."
"What shall we do, mein herr?" asked the lieutenant of the submarine. "She can do twenty-five knots and we can only do seventeen while we are submerged."
"We must run her awash, and give her three-inch shells with the deck guns. The transports and patrols are some distance off now."
"She will be calling back the destroyers by now with her wireless, mein herr."
"Gott in Himmel! but we must risk it. There may just be time. I wish we had let the blamed hooker go by."
Then, with a few round oaths, he switched down the periscope, pulled over the lever that drove the water out of the ballast tanks, and, as the boat came to the surface, he had the hatch unshipped, and ordered his gun crew to stations, calling them dachshunds, and a few more vile names.
As soon as the submarine came to the surface, the electric motors were stopped, and the surface engines started so that every knot could be got out of them.
"All clear!" had been reported to him by the lieutenant, and as regards the narrow horizon which can be surveyed from the periscope of a submerged vessel, all was indeed clear, for they had not seen the hornet which was buzzing overhead, silently dipping and nose-diving with her engines shut off, and rapidly manoeuvring like an angry wasp, waiting but an opportunity to get at its victim.
So intent was the submarine commander upon his prey, with one eye on the hospital ship and another on the horizon, watching for the patrol boats, which he knew would be sure to return, that he had even got his deck-gun to work, and was firing rapidly at the Galicia, when to his dismay he heard, just over his head, the whir-r-r-r-r of the aeroplane, as Dastral started his engine again.
"Mein Gott, was ist das?" he cried.
"Ach, Himmel, but we are lost!" came the cry from the gunners and the ober-lieutenant.
"Dachshunds!–you verdomt fools, turn the gun on the aeroplane!" yelled the irate commander, but he realised that he had lost the game.
Nearer and nearer came that dreaded enemy, with its angry buzz, till but a hundred feet above the broad, whale-like back of the submarine, for Dastral, having but the two twenty-pound bombs in his carrier, determined not to miss his chance.
"Be careful, Jock!" he shouted. "Drop it right on her conning-tower. Take no risks."
"Right-o, old fellow!" Jock had replied, his hand on the bomb release. "She's giving us shrapnel, though. Look out!"
"Spit . . . Bang! Spit . . . Bang!" came the bursting shrapnel from the quick-firing gun on the deck of the submarine, and a shot hitting the left aileron of the warplane, just as the observer was releasing the first bomb, caused her to roll and bank so much that the bomb fell into the sea, just a few inches from the starboard beam of the boat.
"Great heavens, you've missed him!" shouted Dastral, as the bomb, which was fitted with a contact fuse, sank down harmlessly into the sea.
Jock bit his lips, which were white with anger at his failure, and placed his hand once more on the bomb release. It was his last bomb. If they failed this time they were done, for already they had lost several struts and wires, and the planes had been holed in a score of places.
Even Dastral's face was pale, though not with fear, as he jammed the rudder bar over with his feet, and using the joy-stick as well, came round swiftly once more, dropping down to within fifty feet of his enemy.
"Great Scott! She's preparing to submerge, Jock. For heaven's sake don't miss her this time!"
Jock did not reply, but taking true aim just as they were directly over the boat, he dropped his second and last bomb fairly and squarely on the conning-tower.
"Whis-s-s-h! Boom-m-m!" came the sound as the bomb descended swiftly and exploded right amidships, splitting the conning tower open, just as it was being closed ready for the boat to descend.
A blinding sheet of flame shot up into the sky, scorching both the pilot and the observer, and a crashing noise followed the explosion, as the submarine, her deck split open and rent in twain, opened out, then sank like a stone, carrying down with her the twenty-two men who manned her.
A few minutes afterwards the only trace of the pirates was an ever-extending patch of oil which floated on the surface of the water, punctured here and there by the air bubbles which forced their way through the patch.
So suddenly did she disappear from view that even the airmen, scorched and bruised and bleeding from slight shrapnel wounds, were amazed at the work of their hands. Dastral was the first to recover speech, however.
"Well done, Jock!" he cried. "Thus may all pirates perish who fire on the Red Cross flag."
The observer did not reply, however, for he had fallen forward in a dead faint, from sheer excitement and loss of blood; perhaps most of all from sheer fear of failure with his last bomb. And now his head was resting against the wind screen just in front of the cockpit.
"Jock! Jock! What's the matter?" Dastral called to him.
The observer made an effort to rouse himself, for he had only momentarily lost consciousness. He lifted up his head, tugged at his leather helmet, and managed at last to pull it off.
"Great Scott! You're wounded!" exclaimed Dastral as he saw the blood streaming from his companion's face.
"It's all right now. I feel better, Dastral. Carry on! The petrol tank overhead here is leaking, and we're about run out. But I've sent a message to the destroyers on the wireless and here they come."
Dastral turned sharply, and looked in the direction which Jock had indicated by slightly raising his hand.
"Yes. Hurrah! Here they come!" he cried.
And indeed there was no mistaking that long trail of black smoke just a couple of miles away, nor the white trail of foam as the combers broke and fell away from the two snake-like boats, which were coming up full pelt, for they had been drawn to the spot by the sound of the firing even before they had picked up Jock's message.
Nor did they come a moment too soon, for the aeroplane was wounded as well as her crew. Her work was done, at any rate for the next few days, until she had been overhauled