Just as the opening strokes of a quarter to two were chiming out from the clock tower, the latter made his appearance. In a quiet and unobtrusive fashion he slipped suddenly into view round the pedestal of Boadicea's statue, and at the same moment a grin of recognition broke over his face as his eyes lit upon Colin. He quickened his steps, and came rapidly up to the seat.

"Thought you might be early, doctor," he began, "so I come along a bit ahead o' me time on purpose." He looked round inquiringly. "But where's the young laidy?"

Colin, who had thrown away his cigarette, rose to his feet. "I've got some bad news for you, Joe," he said. "Miss Seymour has disappeared."

Joe's mouth opened, and he gazed blankly at his companion.

"Disappeared!" he repeated.

"She was taken away in a car at eight o'clock this morning. Some one tricked her into leaving the studio by means of a false message."

With a muttered oath Joe clutched him by the arm.

"Wot, the saime swine that tried to do you in?"

Colin nodded. "Unless I'm wrong, it's the man I spoke to you about—Major Fenton; the one who was talking to 'Spike' Cooper outside the station."

"Well, if yer knows that," exclaimed Joe, "wot the 'ell are we messin' abaht 'ere for? Why don't we go an' wring 'is blarsted neck?"