The Bomb-Makers. Le Queux William

than the Zeppelins!”

      Theodore Drost laughed gleefully, while his daughter, daring to creep forward again, peered through the crack of the door and saw the pair bending over what looked like a square steel despatch-box standing upon the table amid all the scientific apparatus.

      The box, about eighteen inches long, a foot wide, and six inches deep, was khaki-covered, and, though she was not aware of it at the time, it was of the exact type used in the Government offices.

      Fridtjof Nystrom, a tall, dark-haired man, with a red, blotchy face, rather narrow-eyed and round-shouldered, was adjusting something within the box, while old Drost, who had discarded his shabby black pastor’s coat and now wore a dark-brown jacket, took up a small glass retort beneath which the blue flame of a spirit-lamp had been burning, and from it he poured a few drops of some bright red liquid into a tiny tube of very thin glass. Then, taking a small blow-pipe, he blew the flame upon the tube until he had melted the glass and sealed it hermetically.

      The blotchy-faced man watched this latter operation with great interest, saying:

      “Have a care now, my dear Theodore. The least mishap, and not a piece of either of us would remain to tell the story.”

      “Ja! Leave that to me,” answered Ella’s father. “We do not, I agree, desire a repetition of the disaster which happened last week.”

      Ella, hearing those words, stood aghast.

      A week before all London had been mystified and horrified by a most remarkable explosion which had occurred one night in a house in one of the outer suburbs, whereby the place had been set on fire and utterly demolished. Whoever were present in the house had been blown to atoms, for no trace of the occupants, or of what had caused the disaster, had been discovered. At first it was believed to have been caused by an incendiary bomb dropped from the air, but expert evidence quickly established the fact that something within the house had exploded.

      Was it possible that her father and his dastardly companions possessed knowledge of what had actually occurred there?

      Suddenly, Drost having handed the tiny sealed tube to Nystrom, the latter proceeded to place it in position within the box, using most infinite care. Then her father turned upon his heel, and came forward to the door behind which his daughter was standing.

      In a second Ella had shrunk back noiselessly into the cupboard, which the old man passed in the darkness, and descended the stairs.

      He had passed the door of Ella’s room when, having gained the bottom of the stairs, he paused and whistled softly. In a few seconds Nystrom came forth.

      “Come, Fridtjof,” he urged in a low whisper. “Let us drink to the success of our expedition to-night, and the victory of our dear Fatherland,” an invitation which his visitor at once accepted.

      Ella heard the two men descend, making but little noise, and a moment later she crept into the long, well-lit laboratory where, upon the table, stood the big official-looking despatch-box.

      A second’s glance was sufficient to reveal the truth even to her, a woman unversed as she was in such things. It was a most ingeniously-constructed infernal machine which would detonate the quantity of high-explosive which she saw had been placed within.

      Though her father had taken the greatest precaution to conceal from his daughter the exact line of his chemical experiments, yet, if the truth be told, Ella and her lover had watched carefully, and Kennedy – who had shared his well-beloved’s suspicions – had ascertained, without doubt, that Drost and Nystrom had been engaged in that long, low room beneath the roof, in treating toluene with nitric and sulphuric acid for several days under heat thus producing tri-nitro-toluene – or trotul – that modern high-explosive, of terrible force, which was rapidly superseding picric acid as a base for shell-fillers.

      At a glance Ella saw that the square steel bomb, fashioned like an official despatch-box, was filled with this highly dangerous explosive, and that the thin glass tube which, when broken, would explode it, had already been placed in position. Such a bomb, on exploding in a confined space, must work the most terrible havoc.

      In those few seconds the girl verified the suspicion which Kennedy had entertained. Some desperate outrage was to be committed. That was quite certain.

      A bomb from a Zeppelin could not cause greater injury to life and property than that ingeniously contrived machine, the delicately constructed fuse of which, fashioned on the lathe by her father’s own hands, could be arranged to detonate at any given time.

      A second’s pause, and then the girl, beneath her breath, took a deep oath of vengeance against the ruler of that hated land wherein she had been born.

      “Thank Heaven that I am English!” she whispered to herself. “And I will live – and die, if necessary – as an English girl should.”

      With those words upon her lips she crept away from the laboratory, down the stairs to her room, and, swiftly putting on her fur coat, she went into the basement, from which she let herself out noiselessly, and then hurried through the night, in the direction of Hammersmith Bridge.

      On gaining the bridge, she saw the red rear-light of a motor-car, and knew that it was Kennedy’s. He had drawn up against the kerb, and had been consuming cigarettes waiting in impatience for a long time.

      “Well, darling?” he asked, as they met. “I got your message from the theatre to-night. What is in progress?”

      “Something desperate,” was her quick reply. “Let’s get into the car and I’ll explain.”

      Both entered the comfortable little coupé, and then Ella explained in detail to her flying-man lover all that she had discovered.

      The keen-faced, clean-shaven young officer in uniform who, before he had gone in for aviation duties, had graduated at Osborne, and afterwards been at sea and risen from “snotty” to lieutenant, sat beside her, listening intently.

      “Just as we thought, darling,” he remarked. “For me, loving you so dearly, it is a terrible thing to know that your father is such a deadly and ingenious enemy of ours as he is. Truly the German plotters are in our midst in every walk of life, from high society down to the scum of the East End. The brutes are out to win the war by any underhand, subtle, and brutal means in their power. But we have discovered one line of their enemy intentions and, with your aid, dearest, we will follow it up and, without exposing your father and bringing disgrace upon you, we’ll set out to combat them every time.”

      “Agreed, dear,” declared the girl with patriotic enthusiasm. “I have told you all along of my suspicions. To-night they are verified. Father, and that devilish scoundrel, Nystrom, mean mischief – for payment too – one thousand pounds each!”

      “The infernal brutes!” exclaimed the man at her side. “At least it is to you, dear, that this discovery is due. I had no idea what you were after when you sent me that wire to-night.”

      “I suspected, and my suspicions have proved correct,” said the girl. “Shall we wait here and follow them? They must cross the river if they intend to go into London to-night – as no doubt they do.”

      “Yes. They believe you to be soundly asleep, I suppose?”

      “I locked my door, and have the key in my pocket,” replied his well-beloved with a light laugh.

      And she, putting her ready lips to his, sat with him in the car at the foot of the long suspension-bridge, waiting for any person to cross.

      They remained there for perhaps half-an-hour, ever eager and watchful. Several taxis passed, but otherwise all was quiet in the night. Now and then across the sky fell the big beams of searchlights seeking enemy aircraft, and these they were watching, when, suddenly, a powerful, dark-painted car approached.

      “Look!” cried Ella. “Why, that’s that fellow Benyon’s car – he’s a friend of Dad’s!”

      Next moment it flashed past, and beneath the dim light at the head of the bridge they both caught a glimpse of two men within, one of whom was undoubtedly Theodore Drost.

      “Quick!” cried Ella. “Let’s