“I have promised the chief officer that I will tell absolutely no one,” he said. “I have a plan, and I believe that in time it must be successful. I know well enough that I could tell you both of it without any fear of its going further, but he asked me to promise, and I did so without reservation; moreover, I think that for some reasons it is as well that even you should not know it. As it is, you are aware that I am going to try, and that is all. If I were to tell you how, you might be picturing all sorts of imaginary dangers and worrying yourself over it, so I think that it will be much the best that you should remain in ignorance, at any rate for a time. I can say this, that I shall for the present remain principally in London, and I think that I am more likely to come upon a clew here than elsewhere.”
Millicent pouted, but Mrs. Cunningham said: “I think, perhaps, that you are right, Mark, and it is better that we should know nothing about it; we shall know that you are looking for a clew, but of course no danger can arise until you obtain it and attempt to arrest him. I feel sure that you will do nothing rash, especially as if any harm befell you he might escape unpunished, and therefore that when the time comes to seize him you will obtain such help as may be necessary, and will, if possible, arrest him at a moment when resistance is impossible.”
“Thank you, Mrs. Cunningham; I shall certainly spare no efforts in taking him that way, and would far rather he met his fate on a gibbet than by a bullet from my pistol.”
“I agree with you, Mark,” Millicent said; “even hanging is too good for such a wicked man. When are you going to set about it?”
“I hope to be able to begin tomorrow,” he said. “I am impatient to be at work, even though I know perfectly well that it may be months before I can get on his track. I hope to get a good deal of information as to the habits of men of his kind from the Bow Street runners, and I have an appointment tomorrow morning to see their chief, who will give me every assistance in his power.”
“Then you will not be able to take us out?” Millicent said.
“I trust to do so later on, but I cannot say how long I shall be engaged. However, I hope to get away so as to go out with you after lunch, and may possibly be able to postpone my getting regularly to work until after you have gone, so as to be able to devote myself to your service.”
“But what sort of work? I cannot make out how you are going to begin.”
“I can tell you this much, that to begin with I shall go in company with a constable to various places where such a man is likely to be found. It will take some time to acquaint myself with all these localities; the next step will be to find out, if possible, if anyone at all answering to his description is in the habit of coming there occasionally, and whom he visits; another thing will be to find out the places where receivers of stolen goods do their business, and to watch those with whom highwaymen are suspected of having dealings. All this, you see, will entail a lot of work, and require a very large amount of patience. Of course, if nothing whatever comes of such inquiries, I shall have to try quiet places in the suburbs; you must remember that this fellow during his time as a convict must have had opportunities of getting a vast amount of information likely to be useful to him, such as the addresses of men holding positions of apparent respectability, and yet in alliance with thieves. You may be sure that when he returned he took every imaginable pains to obtain a safe place of concealment before he began his work; my own opinion is that I am more likely to find him living quietly in a suburban cottage than in a London slum.”
Millicent was now thoroughly interested in the search. “It seems a great business, Mark, but going into it as thoroughly as you are doing I feel sure that you will succeed. I only wish that I could help you; but I could not do that, could I?” she asked wistfully.