IV—The Mysterious ForeignerTowards noon the following day Inspector McKinnon, of Scotland Yard, was ushered into Room 13, where Mr. Grant, Lord Hunkin, and two officials of the Counter Espionage Department were awaiting him.
The inspector was a big, stout man with a heavy face. He looked as if he were always very sure of himself.
"Well, gentlemen," he said, "we are watching from a room upon the first floor of a building almost directly opposite, and we had a good look at those men as they arrived at their office this morning, and they are none of them known to us. They seem a pretty shrewd lot and quite capable of taking good care of themselves." He shook his head. "But they undoubtedly had no idea yesterday evening that anything might be threatening them, for that estate agent didn't go
