“Half an hour passed, but nothing unusual occurred, until just after the clock had struck three, a rather tall, thin man passed quietly along. He was in evening-dress, and wore pumps, for his tread was noiseless. The man describes him as an aristocratic-looking person, and evidently a foreigner. At Statham’s door he suddenly halted, looked up and down furtively to satisfy himself that he was not being watched, and then slipped inside.”

“And what then?” inquired Lyle, much interested.

“A very queer circumstance followed,” went on the cosmopolitan. “There was, an hour and a half later, an exact repetition of the scene witnessed by the chauffeur.”

“What! the black trunk?”

“Yes. A cab drove up near to the house, and, at signal from Levi, came up to the kerb. Then the long, heavy box was brought out by the servant and his master, heaved up on to the cab, which drove away in the direction of the Marble Arch.”

“Infernally suspicious,” remarked the hunchback, tossing his cigarette end into the grate. “Didn’t the washer take note of the number of the cab?”

“No. That’s the unfortunate part of it. Apparently he didn’t notice the crawling four-wheeler until he saw Levi come forth and give the signal.”

“And the aristocratic-looking foreigner? Could he recognise him again?”

“He says he could.”

“That was last night—eh?”