"Yes, it was indeed providential," Mark said, "though I think that, feeble as he has been for some months, it might have been kept from him. Still, a word from a chance visitor, who did not associate Bastow the murderer with our dear old friend, might have enlightened him, and the blow would have been a terrible one indeed. It is true that, as it was, he died from the shock, but he did not know the hand that struck the blow."

"Now that you have told me this," Millicent said, "I cannot blame you, Mark, for determining to hunt the man down. It seems even worse than it did before; it is awful to think that anyone could cherish revenge like that. Now tell me how you are going to set about it."

"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."