“She’s just gone up to her flat. Come along. We’ll take a taxi—not that death-rattle of yours. Hurry up, I don’t want to miss her.”

The door of the flat in South Audley Street was opened by Mrs. Forrest in person. Wimsey recognised her instantly from the description. On seeing Parker’s card, she made no objection whatever to letting them in, and led the way into a pink and mauve sitting-room, obviously furnished by contract from a Regent Street establishment.

“Please sit down. Will you smoke? And your friend?”

“My colleague, Mr. Templeton,” said Parker, promptly.

Mrs. Forrest’s rather hard eyes appeared to sum up in a practised manner the difference between Parker’s seven-guinea “fashionable lounge suiting, tailored in our own workrooms, fits like a made-to-measure suit,” and his “colleague’s” Savile Row outlines, but beyond a slight additional defensiveness of manner she showed no disturbance. Parker noted the glance. “She’s summing us up professionally,” was his mental comment, “and she’s not quite sure whether Wimsey’s an outraged brother or husband or what. Never mind. Let her wonder. We may get her rattled.”

“We are engaged, Madam,” he began, with formal severity, “on an inquiry relative to certain events connected with the 26th of last month. I think you were in Town at that time?”

Mrs. Forrest frowned slightly in the effort to recollect. Wimsey made a mental note that she was not as young as her bouffant apple-green frock made her appear. She was certainly nearing the thirties, and her eyes were mature and aware.

“Yes, I think I was. Yes, certainly. I was in Town for several days about that time. How can I help you?”

“It is a question of a certain bank-note which has been traced to your possession,” said Parker, “a £5 note numbered x/y58929. It was issued to you by Lloyds Bank in payment of a cheque on the 19th.”

“Very likely. I can’t say I remember the number, but I think I cashed a cheque about that time. I can tell in a moment by my cheque-book.”