Then he shook hands with Coulson and threw himself into a corner of the cab which was waiting.
"Drive down the Brompton Road," he said to the man.

"I'll direct you later." It was a quarter past seven when he left the hotel.

At half past a policeman held up his hand and stopped the taxi, to the driver's great astonishment, as he was driving slowly across Melbourne Square, Kensington.
"What's the matter ?" the man asked.

"You can't say I was exceeding my speed limit." The policeman scarcely noticed him.

His head was already through the cab window.
"Where did you take your fare up ?" he asked quickly.
"Savoy Hotel," the man answered.