I was bound, after my experience, to agree with him. But again I referred to Mabel, and to the manner in which she had been decoyed from home.

“You hear that, Joseph?” he exclaimed, turning to his feathered pet, who had been chatting and screeching as we had been speaking. “This gentleman suspects your master, Joseph. What do you say?”

“You’re a fool for your pains! You’re a fool for your pains!” declared the bird. “Poor Jo-sef! Poor Jo-sef wants to go to bed!”

“Be quiet! You’ll go to bed presently,” answered the queer, grey visaged, sphinx-like man, who, turning again towards me, and looking me straight in the face, once more assured me that I was foolish in my misapprehension of the truth.

“To me it really does not matter who killed Professor Greer, or who has usurped his place in the world of science,” I said. “My only aim now is to recover my lost wife. Antonio, when I met him in Rome, was anxious that, in exchange for information concerning her, I should consent to keep a still tongue as to what had occurred in Sussex Place.”

“Rubbish, my dear sir!”—and Kirk laughed heartily. “What can Antonio possibly know? He’s as ignorant and innocent of the whole affair as you are yourself.”

“How do you know that, pray?”

“Well, am I not endeavouring to elucidate the mystery?” he asked.

“And you know more than you will tell me?”

I said.