The exhibition building was gay with bunting and was sonorous with the sounds of a band of music. The machinery that would not stop for six months was still motionless, for it was to be started in an hour's time by His Highness. His Highness and suite had not yet arrived but the building was crowded by a well-dressed throng of invited guests--the best in the land as far as fame, title or money was concerned. Underneath the grand stand where His Highness and the distinguished guests were to make speeches and where the finger of nobility was to press the electric button, Bradley walked anxiously about, with the same haggard look on his face that was there the night he thought of slipping into the Thames. The place underneath was a wilderness of beams and braces. Bradley's wooden tool chest stood on the ground against one of the timbers. The foremen came through and struck a beam or a brace here and there. "Everything is all right," he said to Bradley. "There will be no trouble, even if it was put up in a hurry, and in spite of the strain that will be on it to-day." Bradley was not so sure of that, but he said nothing. When the foreman left him alone, he cautiously opened the lid of his tool chest and removed the carpenter's apron which covered something in the bottom. This something was a small box with a clockwork arrangement and a miniature uplifted hammer that hung like the sword of Damocles over a little copper cap. He threw the apron over it again, closed the lid of the chest, leaned against one of the timbers, folded his arms and waited. Presently there was a tremendous cheer and the band struck up. "He is coming," said Bradley to himself, closing his lips tighter. "Carpenter," cried the policeman putting in his head through the little wooden door at the foot of the stage, "come here, quick. You can get a splendid sight of His Highness as he comes up the passage." Bradley walked to the opening and gazed at the distinguished procession coming toward him. Suddenly he grasped the arm of the policeman like a vice. "Who is that man in the robes--at the head of the procession?" "Don't you know? That is His Highness." Bradley gasped for breath. He recognized His Highness as the man he had met on the embankment. "Thank you," he said to the policeman, who looked at him curiously. Then he went under the grand stand among the beams and braces and leaned against one of the timbers with knitted brows.