Her cheeks went paler, and she bit her lip. Her whole attitude was that of a woman aware of a bitter and tragic truth, yet, for her own honour, she dared not divulge it. She undoubtedly held the secret—the secret of her father’s death. Yet, for some purpose that was yet a complete enigma, she was protecting the impostor who had stepped into the dead man’s shoes.

The pair had brought me down there in order to entrap me—most probably a plot of Kirk’s. Their intention was to mislead and deceive me, and at the same time to secure my silence. But in my frantic anxiety and constant dread I was not easily entrapped. I had seen through the transparency of Kirk’s attitude, and I had likewise proved to my own satisfaction that, however much of the truth Leonard Langton knew, the girl of the innocent eyes was feigning an ignorance that was culpable, for within her heart she knew the truth of her father’s tragic end, even though she calmly asserted that he still lived and was in the best of health.

I had believed on entering that room, the windows of which looked out upon that grey-green wintry sea, that I should learn something concerning my dear wife, that I should perhaps obtain a clue to her whereabouts.

But as I fixed my eyes upon those of Ethelwynn Greer, I saw in them a guilty knowledge, and by it knew that in that direction hope was futile.

True, she had sounded me as to what undertaking I was ready to give, but the whole situation was so horrible and so bewildering that I could not bring myself to make any compact that would prevent Greer’s assassin being exposed.

So, instead, I sat full of chagrin, telling the pair much which held them in fear and apprehension.

It was evident that I knew more than they had believed I did, and that Langton was filled with regret that he had invited me there.

What, I wondered, could possibly be Ethelwynn’s motive in concealing her father’s death? I recollected how the assassin must have brushed past her in the Red Room to enter the laboratory on that fatal night, and that he must have again passed her on leaving.

Did she awake and recognise him, or had she herself been an accomplice in securing her father’s sudden and tragic end? Who could tell? In that startling suggestion I found much food for deep reflection.