"I have a theory upon the point," replied the lawyer, "which, however, at present is so vague and unsatisfactory that it would be folly to disclose it."

"And the Nine of Hearts," said Dr. Daincourt, "you have not mentioned that lately--have you forgotten it?"

"No," said the lawyer, "it is my firm opinion that round that Nine of Hearts the whole of the mystery revolves."

[PART THE THIRD.]

THE MYSTERY OF THE NINE OF HEARTS.

"From Mr. Bainbridge, Q. C., to Archibald Laing, Esq.

"Dear Sir,--Last night I received your cable from Pittsburg, and sent you a message in reply, accepting the commission with which you have been pleased to intrust me. This morning I called upon Messrs. Morgan & Co., Bankers, Threadneedle Street, and learned from them that they were prepared to advance me the ten thousand dollars of which you advised me. I drew upon them for that amount, and received from them a notification that they would honor my further drafts upon them the moment they were drawn. I asked them whether, in the event of my desiring to draw say five thousand pounds, I was at liberty to do so. They said yes, for even a larger amount if I required it. I did not explain to them the reason of my asking the question, but I will do so to you. It has happened, in difficult cases, that information has had to be purchased, and that a bribe more or less tempting has had to be held out to some person or persons to unlock their tongues. I have no reason to suppose that anything of the sort will be necessary in this case, but I wish to feel myself perfectly free in the matter. I am satisfied with your bankers' replies, and I shall spare neither money nor exertion in the endeavor to unravel the mystery which surrounds the death of Mrs. Edward Layton.

"It is scarcely possible you can be aware of it, but it is nevertheless a fact that, apart from my professional position in this matter, I take in it an interest which is purely personal, and that my sympathies are in unison with your own. Were it not that I have had some knowledge of Mr. Layton, and that I esteem him, and were it not that I firmly believe in his innocence, I should, perhaps, have hesitated to engage myself in his case, and you will excuse my saying that your liberal views upon the subject of funds might have failed to impress me. It is, therefore, a matter of congratulation that I enlist myself on Mr. Layton's side as much upon personal as upon professional grounds. The time has been too short for anything yet to be done, but it will be a satisfaction to you to learn that I have a slight clew to work upon. It is very slight, very frail, but it may lead to something important. Your desire for a full and complete recital of my movements shall be complied with, and I propose, to this end, and for the purpose of coherence and explicitness, to forward the particulars to you from time to time, not in the form of letters, but in narrative shape. This mode of giving you information will keep me more strictly to the subject-matter, and will be the means of avoiding digression. After the receipt, therefore, of this letter, what I have to say will go forth under numbered headings, not in my own writing, but in that of a short-hand reporter, whom I shall specially employ. I could not myself undertake such a detailed and circumstantial account as I understand it is your desire to obtain. Besides, it will save time, which may be of great value in the elucidation of this mystery.

"I am, dear sir, faithfully yours,

"HORACE BAINBRIDGE."