“I am glad to hear it,” Mr. Sabin said.

Wolfenden looked at him in some surprise. He could not make up his mind whether it was his duty to disclose the name of the man who had made this strange attempt.

“Your assailant was, I suppose, a stranger to you?” he said slowly.

Mr. Sabin shook his head.

“By no means. I recognised him directly. So, I believe, did you.”

Wolfenden was honestly amazed.

“He was your guest, I believe,” Mr. Sabin continued, “until I entered the room. I saw him leave, and I was half-prepared for something of the sort.”

“He was my guest, it is true, but none the less, he was a stranger to me,” Wolfenden explained. “He brought a letter from my cousin, who seems to have considered him a decent sort of fellow.”

“There is,” Mr. Sabin said dryly, “nothing whatever the matter with him, except that he is mad.”