“There is a sensible conjecture. Yes, there is something in that. He certainly could not have carried about him 50,000 pounds in gold and as much in jewelry; it would have been the act of a madman, and Colonel Thorndyke, although eccentric and cranky, was not mad. But, on the other hand, he may have carried about a banker's passbook, or what is equivalent to it, for the amount that had been deposited with a native banker or agent, together with a receipt for the box containing the jewels, and this he might have hidden with the diamonds.”

“I don't think that he would have done that; there could have been no object for his putting the power of demanding his money and valuables out of his possession.”

“Well, well,” the lawyer said testily, “it is of no use arguing now what he might or might not have done. A man who would have taken the trouble that he did to prevent his daughter knowing that she was an heiress, and fancied that he was followed about by black fellows, might do anything, reasonable or unreasonable, under the sun. At any rate, Mr. Thorndyke, I will carry out your instructions as to inquiries in London, and will duly inform you of the result; beyond that I must really decline to give any advice or opinion upon the matter, which is altogether beyond me.”

On leaving the lawyer's, Mark went to Bow Street, and related to the chief the circumstances attending his father's murder.

“I have heard them from the man I sent down at your request, Mr. Thorndyke, and taking the attempt early in the evening and the subsequent murder, there can be no doubt that the affair was one of revenge, and not of robbery. Had the second attempt stood alone, robbery might have been the object; the mere fact that nothing was stolen in no way alters the case. Men are often seized with a certain panic after committing a murder, and fly at once without attempting to carry out their original purpose. Your father, no doubt, fell heavily, and the man might well have feared that the fall would be heard; but the previous attempt precludes the supposition that robbery was at the bottom of it. It points to a case of revenge, and certainly goes a very long way to support the theory that we talked over when I last saw you, that the highwayman who endeavored to stop you on the road, whom you wounded, and who afterwards went down to Southampton, was the escaped convict, Bastow. Since that time I have had a man making inquiries along the roads between Reigate and Kingston, but altogether without success. I should be glad to follow up any other line that you might suggest, and that might offer any reasonable possibility of success, but I must own that at present we are entirely off the scent.”

“I am thinking of devoting myself entirely to the quest. I have no occupation at present. I have an income amply sufficient for my wants, and for all expenses that I may incur, and I intend to devote, if necessary, some years of my life to hunting this man down. As your men have searched without success in the country, I think for the present my best plan will be to devote myself to learning something of the ways and haunts of the criminal classes of London, and it is with that object that I have come to you now. I should like, for some time, at any rate, to enter the detective force as an enrolled member. I should, of course, require no pay, but should be prepared to obey all orders and to do any work required, as any other member of the corps would do. I am strong, active, and have, I hope, a fair share of intelligence. I should not mind risking my life in carrying out any duty that you might assign to me. I presume that I need not always be on duty, and could, when not required, employ my time as I liked, and keep up my acquaintances in town. Should it be otherwise, however, I am perfectly ready to submit myself in all respects to your rule. I have a first rate horse and should be available for country duty, wherever you might think fit to send me. I should not desire any distinction to be made between me and the paid officers.”

“Your proposal is an altogether novel one, Mr. Thorndyke, but it is worthy of consideration. I have no doubt that you would make a very useful officer; the work is certainly interesting, though not without serious hazards. However, I will think the matter over, and if you will call in tomorrow you shall have my answer. We are always glad to have a new hand in the force, for the faces of our men are so well known among the criminal class that they are liable to be detected even under the cleverest disguises. There is work, too, upon which it is absolutely necessary that a gentleman should be employed, and in the event of your joining us, I should wish you to keep the matter strictly from all your acquaintances; and it would certainly be advantageous that you should, when disengaged, continue to mix with your friends and to mingle in society of all kinds as freely as possible. There is crime among the upper classes as well as among the lower, though of a different type; and as Mr. Thorndyke of Crowswood you would have far better opportunities of investigating some of these cases than any of my men would have. You would not object to take up such cases?”

“Not at all, sir; that is, if it could be arranged that I should not do the actual work of making an arrest, or have to appear in court as a witness.”

“That could be managed,” the chief said “When you have got to a certain point the matter of the final arrest could always be handed over to someone else, but as a rule we keep our officers in the background as much as possible, because at every trial the court is half full of men of the criminal class, and the faces of our men would soon be known to every one of them. Well, if you will call about ten o'clock tomorrow you shall have my answer; but I should advise you to think the matter well over before you see me again. The responsibilities as well as the dangers are great, and indeed in some of the work you would literally have to carry your life in your hand; and I can assure you that the task you would undertake is by no means a light one.”

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