“I will bring you the letters back to-night,” Mr. Skinner said. “I guess I’ll borrow that locket of yours, too.”

Mr. Sabin shook his head.

“That,” he said firmly, “I do not part with.” Mr. Skinner scratched his ear with his penholder. “It’s the only scrap of identifying matter we’ve got,” he remarked. “Of course it’s a dead simple case, and we can probably manage without it. But I guess it’s as well to fix the thing right down.”

“If you will give me a piece of paper,” Mr. Sabin said, “I will make you a sketch of the Duchess. The larger the better. I can give you an idea of the sort of clothes she would probably be wearing.”

Mr. Skinner furnished him with a double sheet of paper, and Mr. Sabin, with set face and unflinching figures, reproduced in a few simple strokes a wonderful likeness of the woman he loved. He pushed it away from him when he had finished without remark. Mr. Skinner was loud in its praises.

“I guess you’re an artist, sir, for sure,” he remarked. “This’ll fix the thing. Shall I come to your hotel?”

“If you please,” Mr. Sabin answered. “I shall be there for the rest of the day.”

Mr. Skinner took up his hat.

“Guess I’ll take my dinner and get right to work,” he remarked. “Say, you come along, Mr. Sabin. I’ll take you where they’ll fix you such a beefsteak as you never tasted in your life.”

“I thank you very much,” Mr. Sabin said, “but I must beg to be excused. I am expecting some despatches at my hotel. If you are successful this afternoon you will perhaps do me the honour of dining with me to-night. I will wait until eight-thirty.”