“It is not only the mother in the flesh who knows what a mother’s love is,” added Muller.

Next morning Joseph Muller stood in the cell of the prison in G———— confronting Albert Graumann, accused of the murder of John Siders.

The detective had just come from a rather difficult interview with Commissioner Lange. But the latter, though not a brilliant man, was at least good-natured. He acknowledged the right of the accused and his family to ask for outside assistance, and agreed with Muller that it was better to have some one in the official service brought in, rather than a private detective whose work, in its eventual results, might bring shame on the police. Muller explained that Miss Graumann did not want her nephew to know that it was she who had asked for aid in his behalf, and that it could only redound to his, Lange’s, credit if it were understood that he had sent to Vienna for expert assistance in this case. It would be a proof of his conscientious attention to duty, and would insure praise for him, whichever way the case turned out. Commissioner Lange saw the force of this argument, and finally gave Muller permission to handle the case as he thought best, rather relieved than otherwise for his own part. The detective’s next errand was to the prison, where he now stood looking up into the deep-set, dark eyes of a tall, broad-shouldered, black-bearded man, who had arisen from the cot at his entrance. Albert Graumann had a strong, self-reliant face and bearing. His natural expression was somewhat hard and stern, but it was the expression of a man of integrity and responsibility. Muller had already made some inquiries as to the prisoner’s reputation and business standing in the community, and all that he had heard was favourable. A certain hardness and lack of amiability in Graumann’s nature made it difficult for him to win the hearts of others, but although he was not generally loved, he was universally respected. Through the signs of nagging fear, sorrow, and ill-health, printed clearly on the face before him, Muller’s keen eyes looked down into the soul of a man who might be overbearing, pitiless even, if occasion demanded, but who would not murder—at least not for the sake of gain. This last possibility Muller had dismissed from his mind, even before he saw the prisoner. The man’s reputation was sufficient to make the thought ridiculous. But he had not made up his mind whether it might not be a case of a murder after a quarrel. Now he began to doubt even this when he looked into the intelligent, harsh-featured face of the man in the cell. But Muller had the gift of putting aside his own convictions, when he wanted his mind clear to consider evidence before him.

Graumann had risen from his sitting position when he saw a stranger. His heavy brows drew down over his eyes, but he waited for the other to speak.

“I am Detective Joseph Muller, from Vienna,” began the newcomer, when he had seen that the prisoner did not intend to start the conversation.

“Have you come to question me again?” asked Graumann wearily. “I can say no more than I have already said to the Police Commissioner. And no amount of cross-examination can make me confess a crime of which I am not guilty—no matter what evidence there may be against me.” The prisoner’s voice was hard and determined in spite of its note of physical and mental weariness.

“I have not come to extort a confession from you, Mr. Graumann,” Muller replied gently, “but to help you establish your innocence, if it be possible.”

A wave of colour flooded the prisoner’s cheek. He gasped, pressed his hand to his heart, and dropped down on his cot. “Pardon me,” he said finally, hesitating like a man who is fighting for breath. “My heart is weak; any excitement upsets me. You mean that the authorities are not convinced of my guilt, in spite of the evidence? You mean that they will give me the benefit of the doubt—that they will give me a chance for life?”

“Yes, that is the reason for my coming here. I am to take this case in hand. If you will talk freely to me, Mr. Graumann, I may be able to help you. I have seen too many mistakes of justice because of circumstantial evidence to lay any too great stress upon it. I have waited to hear your side of the story from yourself. I did not want to hear it from others. Will you tell it to me now? No, do not move, I will get the stool myself.”

Graumaun sat back on the cot, his head resting against the wall. His eyes had closed while Muller was speaking, but his quieter breathing showed that he was mastering the physical attack which had so shaken him at the first glimpse of hope. He opened his eyes now and looked at Muller steadily for a moment. Then he said: “Yes, I will tell you: my life and my work have taught me to gauge men. I will tell you everything I know about this sad affair. I will tell you the absolute truth, and I think you will believe me.”