"In other words, it may be a faked number."

"Likely enough, sir, but rather risky. The police are quick at
spotting that sort of thing."

"Can you take a hand in the game? I want to know where that car goes
to."

The man grinned.

"I wouldn't like to humbug you, sir. That there machine can lose me
quicker'n a Derby winner could pass a keb horse. Didn't you hear the
hum of the engine as it went by?"

"Thanks. Now go ahead to Innesmore Mansions."

He was paying the driver when the gray car stole quietly past the end
of the street, and that was the last he saw of it.

"There it goes again, sir," said the man. "Tell you wot, gimme your
name an' address. I'll make a few inquiries, an' keep me eyes open as
well. Then, if I hear anythink, I'll let you know."

Theydon scribbled the number of his flat on a card.

"There you are," he said. "Even if I happen to be out, I'll leave
instructions that you are to be paid half a crown for your trouble if
you call. By the way, what is your name?"

"Evans, sir."