“Well, Mr. Holmes, that was the state of affairs when I first saw you two days ago. I had no more idea of the truth than you. You will ask me what was James’s motive in doing such a deed. I answer that there was a great deal which was unreasoning and fanatical in the hatred which he bore my heir. In his view he should himself have been heir of all my estates, and he deeply resented those social laws which made it impossible. At the same time, he had a definite motive also. He was eager that I should break the entail, and he was of opinion that it lay in my power to do so. He intended to make a bargain with me - to restore Arthur if I would break the entail, and so make it possible for the estate to be left to him by will. He knew well that I should never willingly invoke the aid of the police against him. I say that he would have proposed such a bargain to me; but he did not actually do so, for events moved too quickly for him, and he had not time to put his plans into practice.

“What brought all his wicked scheme to wreck was your discovery of this man Heidegger’s dead body. James was seized with horror at the news. It came to us yesterday, as we sat together in this study. Dr. Huxtable had sent a telegram. James was so overwhelmed with grief and agitation that my suspicions, which had never been entirely absent, rose instantly to a certainty, and I taxed him with the deed. He made a complete voluntary confession. Then he implored me to keep his secret for three days longer, so as to give his wretched accomplice a chance of saving his guilty life. I yielded - as I have always yielded - to his prayers, and instantly James hurried off to the Fighting Cock to warn Hayes and give him the means of flight. I could not go there by daylight without provoking comment, but as soon as night fell I hurried off to see my dear Arthur. I found him safe and well, but horrified beyond expression by the dreadful deed he had witnessed. In deference to my promise, and much against my will, I consented to leave him there for three days, under the charge of Mrs. Hayes, since it was evident that it was impossible to inform the police where he was without telling them also who was the murderer, and I could not see how that murderer could be punished without ruin to my unfortunate James. You asked for frankness, Mr. Holmes, and I have taken you at your word, for I have now told you everything without an attempt at circumlocution or concealment. Do you in turn be as frank with me.”

“I will,” said Holmes. “In the first place, your Grace, I am bound to tell you that you have placed yourself in a most serious position in the eyes of the law. You have condoned a felony, and you have aided the escape of a murderer, for I cannot doubt that any money which was taken by James Wilder to aid his accomplice in his flight came from your Grace’s purse.”

The Duke bowed his assent.

“This is, indeed, a most serious matter. Even more culpable in my opinion, your Grace, is your attitude towards your younger son. You leave him in this den for three days.”

“Under solemn promises- -”

“What are promises to such people as these? You have no guarantee that he will not be spirited away again. To humour your guilty elder son, you have exposed your innocent younger son to imminent and unnecessary danger. It was a most unjustifiable action.”

The proud lord of Holdernesse was not accustomed to be so rated in his own ducal hall. The blood flushed into his high forehead, but his conscience held him dumb.

“I will help you, but on one condition only. It is that you ring for the footman and let me give such orders as I like.”

Without a word, the Duke pressed the electric bell. A servant entered.