“Arrested! What are you talking about?”

“Mr Rooke desired the officer to ask you to be good enough to step round and bail them out!”

The gleam in Lady Underhill’s eye became a flame, but she controlled her voice.

“Why were Miss Mariner and Mr Rooke arrested, Parker?”

“As far as I can gather, m’lady, Miss Mariner struck a man in the street with a stick, and they took both her and Rooke to the Chelsea Police Station.”

Lady Underhill glanced at Derek, who was looking into the fire.

“This is a little awkward, Derek,” she said suavely. “If you go to the police-station, you will miss your train.”

“I fancy, m’lady, it would be sufficient if Sir Derek were to dispatch me with a check for ten pounds.”

“Very well. Tell the policeman to wait a moment.”

“Very good, m’lady.”