"And you think—" the attorney interrupted, breathlessly; but Merrick shook his head and continued,—

"I have also, in the course of my investigations, incidentally discovered Hugh Mainwaring's secret, and, consequently, Hobson's secret, only that I know the real facts in the case, which Hobson does not know. You, as Mainwaring's friend, will not care to learn the details, and I shall not speak of them now, but I will say this much: there are probably in existence to-day, and perhaps not very far distant, heirs to this property, having a claim preceding not only that of Ralph Mainwaring or his son, but of Hugh Mainwaring himself."

There was silence for a few moments as the detective paused, Mr. Whitney's surprise rendering him speechless; at last he said,—

"Well, you are a truthful fellow, Merrick, and you never jump at conclusions, so I know your statements can be relied upon; but I'll be blessed if I understand how or when you have gathered all this information together. I suppose it would be useless to ask your deductions from all this, but I wish you would answer one or two questions. Do you think that this Harold Mainwaring, or those possible heirs you mention, would put in an appearance personally, or that they would work through agents and emissaries?"

"Depends altogether upon circumstances. Harold Mainwaring would not be likely to appear on the scene unless he were pretty effectually disguised. As to the others,—if they were to assert their claim,—it would be difficult to say just what course they might take. I have made these statements merely to give you a hint of the possibilities involved in the case. It is now getting rather late, but I will give you one or two pointers to ruminate upon. Don't think that Hobson will run any risks or put himself to any personal inconvenience for Mrs. LaGrange. He is working first and foremost for Richard Hobson, after that for whoever will pay him best. Another thing, don't ever for a moment imagine that Hugh Mainwaring's private secretary is looking for a job. It's my opinion he'll give you fellows one of the hardest jobs you ever tackled; and, unless I'm greatly mistaken, he's got brains enough and backing enough to carry through whatever he undertakes."

"Say! I don't know as I exactly catch your meaning; but that's one thing I wanted to ask you. What do you think of that young man, anyway? I can't make him out."

"I noticed that you had not assigned him any place in that theory of yours."

"No; he's been a mystery to me, a perfect mystery; but this evening a new idea has occurred to me, and I would like your judgment on it. Has he ever reminded you of any one? That is, can you recall any one whom he resembles?"

"Well, I should say there was a marked resemblance. I've often wondered where your eyes were that you had not seen it."

"You have noticed it, then? Well, so have I; but it has puzzled me, for, though the look was familiar, I was unable to recall whose it was until to-night. Now that I have recalled it, that, taken in connection with some other things I have observed, has led me to wonder whether it were possible that he is a son of Hugh Mainwaring's, of whose existence no one in this country has ever known."