Mr. Mountain was one who showed in his movements that he was a man of business, and accustomed to affairs.

“Are we alone, Mr. Carter?” he added, on entering. “What I have to say is strictly confidential.”

“We cannot be overheard here,” replied Nick.

“Then the next question is, can I rely upon you to take my case?”

“I never decide to take a case until I hear the story,” said Nick, “but whatever confidence you give me will be respected.”

“It’s a case of attempted blackmail,” replied Mr. Mountain.

“The Brown Robin?” asked Nick.

Mr. Mountain stared a moment before he replied:

“Yes, that name has cropped up in the case.”

“Then I take your case,” said Nick, “for I am already engaged. Go on with the story.”