As he went on with his preparations it astonished him to find how many various things had to be thought of in connexion with an apparently simple scheme, the neglect of any one of which would endanger the whole enterprise. His plan was a most uncomplicated one. All he had to do was to tie a canister of dynamite at the end of a string of suitable length, and at night, before the café doors were closed, fling it from his window so that the package would sweep in by the open door, strike against the ceiling of the café, and explode. First he thought of holding the end of the cord in his hand at the open window, but reflection showed him that if, in the natural excitement of the moment, he drew back or leant too far forward the package might strike the front of the house above the door, or perhaps hit the pavement. He therefore drove a stout nail in the window-sill and attached the end of the cord to that. Again, he had to render his canister of explosive so sensitive to any shock that he realised if he tied the cord around it and flung it out into the night the can might go off when the string was jerked tight and the explosion take place in mid-air above the street. So he arranged a spiral spring between can and cord to take up harmlessly the shock caused by the momentum of the package when the string became suddenly taut. He saw that the weak part of his project was the fact that everything would depend on his own nerve and accuracy of aim at the critical moment, and that a slight miscalculation to the right or to the left would cause the bomb, when falling down and in, to miss the door altogether. He would have but one chance, and there was no opportunity of practising. However, Dupré, who was a philosophical man, said to himself that if people allowed small technical difficulties to trouble them too much, nothing really worth doing would be accomplished in this world. He felt sure he was going to make some little mistake that would ruin all his plans, but he resolved to do the best he could and accept the consequences with all the composure at his command.
As he stood by the window on the fatal night with the canister in his hand he tried to recollect if there was anything left undone or any tracks remaining uncovered. There was no light in his room, but a fire burned in the grate, throwing flickering reflections on the opposite wall.
"There are four things I must do," he murmured: "first, pull up the string; second, throw it in the fire; third, draw out the nail; fourth, close the window."
He was pleased to notice that his heart was not beating faster than usual. "I think I have myself well in hand, yet I must not be too cool when I get downstairs. There are so many things to think of all at one time," he said to himself with a sigh. He looked up and down the street. The pavement was clear. He waited until the policeman had passed the door. He would take ten steps before he turned on his beat. When his back was towards the café door Dupré launched his bomb out into the night.
He drew back instantly and watched the nail. It held when the jerk came. A moment later the whole building lurched like a drunken man, heaving its shoulders as it were. Dupré was startled by a great square of plaster coming down on his table with a crash. Below, there was a roar of muffled thunder. The floor trembled under him after the heave. The glass in the window clattered down, and he felt the air smite him on the breast as if some one had struck him a blow.
He looked out for a moment. The concussion had extinguished the street lamps opposite. All was dark in front of the café where a moment before the Boulevard was flooded with light. A cloud of smoke was rolling out from the lower part of the house.
"Four things," said Dupré, as he rapidly pulled in the cord. It was shrivelled at the end. Dupré did the other three things quickly.
Everything was strangely silent, although the deadened roar of the explosion still sounded dully in his ears. His boots crunched on the plaster as he walked across the room and groped for the door. He had some trouble in pulling it open. It stuck so fast that he thought it was locked; then he remembered with a cold shiver of fear that the door had been unlocked all the time he had stood at the window with the canister in his hand.
"I have certainly done some careless thing like that which will betray me yet; I wonder what it is?"
He wrenched the door open at last. The lights in the hall were out; he struck a match, and made his way down. He thought he heard groans. As he went down, he found it was the concierge huddled in a corner.
"What is the matter?" he asked.
"Oh, my God, my God!" cried the concierge, "I knew they would do it. We are all blown to atoms!"
"Get up," said Dupré, "you're not hurt; come with me and see if we can be of any use."
"I'm afraid of another explosion," groaned the concierge.
"Nonsense! There's never a second. Come along."
They found some difficulty in getting outside, and then it was through a hole in the wall and not through the door. The lower hall was wrecked.
Dupré expected to find a crowd, but there was no one there. He did not realise how short a time had elapsed since the disaster. The policeman was on his hands and knees in the street, slowly getting up, like a man in a dream. Dupré ran to him, and helped him on his feet.
"Are you hurt?" he asked.
"I don't know," said the policeman, rubbing his head in his bewilderment.
"How was it done?"
"Oh, don't ask me. All at once there was a clap of thunder, and the next thing I was on my face in the street."
"Is your comrade inside?"
"Yes; he and M. Sonne and two customers."
"And the garçon, wasn't he there?" cried Dupré, with a note of disappointment in his voice.
The policeman didn't notice the disappointed tone, but answered—
"Oh, the garçon, of course."
"Ah," said Dupré, in a satisfied voice, "let us go in, and help them." Now the people had begun to gather in crowds, but kept at some distance from the café. "Dynamite! dynamite!" they said, in awed voices among themselves.
A detachment of police came mysteriously from somewhere. They drove the crowd still further back.
"What is this man doing here?" asked the Chief.
The policeman answered, "He's a friend of ours; he lives in the house."
"Oh," said the Chief.
"I was going in," said Dupré, "to find my friend, the officer, on duty in the café."
"Very well, come with us."
They found the policeman insensible under the débris, with a leg and both arms broken. Dupré helped to carry him out to the ambulance. M. Sonne was breathing when they found him, but died on the way to the hospital. The garçon had been blown to pieces.
The Chief thanked Dupré for his assistance.
They arrested many persons, but never discovered who blew up the Café Vernon, although it was surmised that some miscreant had left a bag containing an infernal machine with either the waiter or the proprietor.
An Electrical Slip
Public opinion had been triumphantly vindicated. The insanity plea had broken down, and Albert Prior was sentenced to be hanged by the neck until he was dead, and might the Lord have mercy on his soul. Everybody agreed that it was a righteous verdict, but now that he was sentenced they added, "Poor fellow!"
Albert Prior was a young man who had had more of his own way than was good for him. His own family—father, mother, brother, and sisters—had given way to him so much, that he appeared to think the world at large should do the same. The world differed with him. Unfortunately, the first to oppose his violent will was a woman—a girl almost. She would have nothing to do with him, and told him so. He stormed, of course, but did not look upon her opposition as serious. No girl in her