"At your command, Sir William," replied Mr. Butler, drawing the keys from his pocket and presenting them with an ironical inclination.

The man's careless self-possession was marvellous considering he was facing the man he had so vilely betrayed.

"Mr. Butler," said Sir William, with reddening face, "I consider myself released from my consent to your union with my kinswoman, Miss Warren!"

"As to that, sir," observed Captain Butler, cynically, "I shall take my chances."

I heard what he said, but Sir William misunderstood him.

"It is your mischance, sir, to put no harsher interpretation on it. But my decision is irrevocable, Mr. Butler, for I have destined Miss Warren to a loyal man, my kinsman, Michael Cardigan!"

The spasm that jerked Mr. Butler's mouth into that ghastly grimace I knew so well, was not lost on Sir William.

"I'll take that chance, too," said Mr. Butler, bowing.

"What do you mean, sir?" demanded Sir William, steadying his voice with an effort.

But Walter Butler only replied with such glare at me that Sir William involuntarily turned to find me, rigid, behind him. The next moment Captain Butler passed noiselessly out into the starlight, wrapping his black cloak around him.