"She is my first cousin," explained Bocaros, sitting down, and keeping himself down by the strongest of efforts. "My father's sister married a man called Calvert, and----"

"Calvert! Why, that's the name of the man Miss Mason's going to be married to!"

"Is it?" The professor stared. "I never knew. Flora told me that her father's brother had a son called Arnold."

"That's the name. He's an actor at one of the big shows. Arnold Calvert. You must have heard of him."

"Never as an actor."

"Well, I guess he's not got much of a reputation. Just now he's acting in a piece at the Frivolity Theatre. The Third Man is the name of the piece. I don't think much of it myself, or of him as----"

Bocaros threw up a protesting hand. "We have more important things to talk about than this young man."

"Well, I don't know. It's queer that he should be the cousin of the woman who was killed in the house of the brother-in-law of the girl he's engaged to. Do you know Calvert?"

"No; I never met him. Listen, Mr. Tracey. I came to England some five or six years ago very poor, as I am now. Here Bocaros looked round his study with a dreary air. I have heard my father talk of his sister who married a man called Calvert, and I had the address. I found my aunt dead, and her daughter Flora just preparing to move from the house where they had lived for a long time. She had very little money, and told me she was going to be married."

"To a man called Brand?"