“They are,” said Lord Peter. “As a matter of fact I did not expect the owner of the glasses to answer my advertisement. Mr. Crimplesham, you have no doubt read what the papers have to say about the Battersea Park mystery. Your glasses are the pair that was found on the body, and they are now in the possession of the police at Scotland Yard, as you may see by this.” He placed the specification of the glasses and the official note before Crimplesham.

“Good God!” exclaimed the lawyer. He glanced at the paper, and then looked narrowly at Lord Peter.

“Are you yourself connected with the police?” he inquired.

“Not officially,” said Lord Peter. “I am investigating the matter privately, in the interests of one of the parties.”

Mr. Crimplesham rose to his feet.

“My good man,” he said, “this is a very impudent attempt, but blackmail is an indictable offence, and I advise you to leave my office before you commit yourself.” He rang the bell.

“I was afraid you’d take it like that,” said Lord Peter. “It looks as though this ought to have been my friend Detective Parker’s job, after all.” He laid Parker’s card on the table beside the specification, and added: “If you should wish to see me again, Mr. Crimplesham, before tomorrow morning, you will find me at the Minster Hotel.”

Mr. Crimplesham disdained to reply further than to direct the clerk who entered to “show this person out.”

In the entrance Lord Peter brushed against a tall young man who was just coming in, and who stared at him with surprised recognition. His face, however, aroused no memories in Lord Peter’s mind, and that baffled nobleman, calling out Bunter from the newspaper shop, departed to his hotel to get a trunk-call through to Parker.

Meanwhile, in the office, the meditations of the indignant Mr. Crimplesham were interrupted by the entrance of his junior partner.