"It leads to the wall of her cell," said Halfoff. "We are close against the wall but we cannot shatter it. We are working to make a bomb. No bomb that we can make is hard enough. We can only try once. If it fails the noise would ruin us. There is no second chance. We try our bombs in the crucible. They crumble. They have no strength.

We are ignorant. We are only learning. We studied it in the books, the forbidden books. It took a month to learn to set the wires to fire the bomb. The tunnel was there.

We did not have to dig it. It was for my father, Vangorod Va.s.selitch. He would not let them use it. He tapped a message through the wall, 'Keep it for a greater need.'

Now it is his daughter that is there."

Halfoff paused. He was panting and his chest heaved.

There was perspiration on his face and his black hair was wet.

"Courage, little brother," said Kwitoff. "She shall not die."

"Listen," went on Halfoff. "The bomb is made. It is there beside the crucible. It has power in it to shatter the prison. But the wires are wrong. They do not work. There is no current in them. Something is wrong. We cannot explode the bomb."

"Courage, courage," said Kwitoff, and his hands were busy among the wires before him. "I am working still."

Serge looked at the brothers.

"Is that the bomb?" he said, pointing at a great ball of metal that lay beside the crucible.

"It is," said Halfoff.

"And the little fuse that is in the side of it fires it?

And the current from the wires lights the fuse?"

"Yes," said Halfoff.

The two brothers looked at Serge, for there was a meaning in his voice and a strange look upon his face.

"If the bomb is placed against the wall and if the fuse is lighted it would explode."

"Yes," said Halfoff despairingly, "but how? The fuse is instantaneous. Without the wires we cannot light it. It would be death."

Serge took the bomb in his hand. His face was pale.

"Let it be so!" he said. "I will give my life for hers."

He lifted the bomb in his hand. "I will go through the tunnel and hold the bomb against the wall and fire it,"

he said. "Halfoff, light me the candle in the flame. Be ready when the wall falls."

"No, no," said Halfoff, grasping Serge by the arm. "You must not die!"

"My brother," said Kwitoff quietly, "let it be as he says. It is for Russia!"

But as Halfoff turned to light the candle in the flame there came a great knocking at the door above and the sound of many voices in the street.

All paused.

Madame Va.s.selitch laid her hand upon her lips.

Then there came the sound as of grounded muskets on the pavement of the street and a sharp word of command.

"Soldiers!" said Madame Va.s.selitch.

Kwitoff turned to his brother.

"This is the end," he said. "Explode the bomb here and let us die together."

Suddenly Madame Va.s.selitch gave a cry.

"It is Olga's voice!" she said.

She ran to the door and opened it, and a glad voice was heard crying.

"It is I, Olga, and I am free!"

"Free," exclaimed the brothers.

All hastened up the stairs.

Olga was standing before them in the hall and beside her were the officers of the police, and in the street were the soldiers. The students from above had crowded down the stairs and with them were Itch, the serving man, and Yump, the cook.

"I am free," cried Olga, "liberated by the bounty of the Czar--Russia has declared war to fight for the freedom of the world and all the political prisoners are free."

"Rah, rah!" cried the students. "War, war, war!"

"She is set free," said the officer who stood beside Olga. "The charge of killing Popoff is withdrawn. No one will be punished for it now."

"I never killed him," said Olga. "I swear it," and she raised her hand.

"You never killed him!" exclaimed Serge with joy in his heart. "You did not kill Popoff? But who did?"

"Defend us," said Yump, the cook. "Since there is to be no punishment for it, I killed him myself."

"You!" they cried.

"It is so," said Yump. "I killed him beside the river.

It was to defend my honour."

"It was to defend her honour," cried the brothers. "She has done well."

They clasped her hand.

"You destroyed him with a bomb?" they said.

"No," said Yump, "I sat down on him."

"Rah, rah, rah," said the students.

There was silence for a moment. Then Kwitoff spoke.