“My dear Mr Ridgeway, however should I know? Jack did not tell me all his little affairs of the heart, for, remember, I am Dora’s sister, and he feared probably that I might tell her,” and she gave vent to a harsh, discordant laugh.

I remembered, with a sudden pang, that the letter I had discovered was undoubtedly in my dead bride’s handwriting, and felt half inclined to disbelieve her; yet she had spoken so frankly that it seemed as though she had told all she knew. It was only her strange laugh, almost hysterical, that aroused doubts within me.

“If anyone should know something of Jack Bethune’s female friends it is yourself. I know you are his confidant,” she added.

“He has no female friends now but Dora,” I observed, “and he loves her dearly.”

“Yes, I know, but they must both see the absurdity of it all,” she said petulantly. “They can never marry, so I cannot see why Dora should trouble her head about him. I declare she has been going about looking quite pale and wretched during the past week. People are beginning to talk.”

“And why can’t they marry?” I asked.

“We’ve discussed the question before,” she replied impatiently. “First, he hasn’t sufficient money, for Dora would ruin him in a year; secondly—” and she paused.

“Well—secondly?”

“Secondly, my sister shall never marry a murderer!” she said in a hoarse half-whisper, first glancing at the door to ascertain that it was still closed.

“But if he returns, and is able to prove that he has had no hand in the sudden disappearance of Gilbert Sternroyd?”