“If the danger is a real one, I consider I ought to be aware of it. To be forewarned is to be forearmed!” I remarked decisively.

“It is a real one, but as my father has confessed the truth to me alone, I am unable to reveal it to you. His secret is mine.”

“Certainly,” I answered, accepting her decision, which, of course, was but natural in the circumstances. She could not betray her dead father’s confidence.

Yet if she had done, how altered would have been the course of events! Surely the story of Burton Blair was one of the strangest and most romantic ever given to man to relate, and as assuredly the strange circumstances which occurred after his decease were even more remarkable and puzzling. The whole affair from beginning to end was a complete enigma.

Later, when Mabel grew slightly calmer, we concluded our work of investigation, but discovered little else of interest save several letters in Italian, undated and unsigned, but evidently written by Dick Dawson, the millionaire’s mysterious friend—or enemy. On reading them they were, I found, evidently the correspondence of an intimate acquaintance who was sharing Blair’s fortune and secretly assisting him in the acquisition of his wealth. There was much mention of “the secret,” and repeated cautions against revealing anything to Reggie or to myself.

In one letter I found the sentences in Italian: “My girl is growing into quite a fine lady. I expect she will become a Countess, or perhaps a Duchess, one day. I hear from your side that Mabel is becoming a very pretty woman. You ought, with your position and reputation, to make a good match for her. But I know what old-fashioned ideas you hold that a woman must marry only for love.”

On reading this, one fact was vividly impressed upon me, namely, that if this man Dawson shared secretly in Blair’s wealth he surely had no necessity to obtain his secret by foul means, when he already knew it.

The clock on the stables chimed midnight before Mabel rang for Mrs Gibbons, and the latter’s husband followed, bringing me a night-cap of whisky and some hot water.

My little companion merrily pressed my hand, wishing me good-night, and then retired, accompanied by the housekeeper, while Gibbons himself remained to mix my drink.

“Sad thing, sir, about our poor master,” hazarded the well-trained servant, who had been all his life in the service of the previous owners. “I fear the poor young mistress feels it very much.”