Suddenly some one touched Oliver lightly upon the shoulder, and instantly he felt the same physical effect that had happened when the master had struck his hands together in the room at the Hôtel de Flourens. It was as though a blow had fallen upon him. Bright sparks danced and flashed before his eyes, his brain spun like a teetotum in a dizzy horizontal whirl, and he clutched the cold stones with his fingers to save himself from falling. Then suddenly the sparks vanished and the whirling ceased, and he awoke sharply as though it were from some horrid nightmare. He gazed stupidly around him, still sitting upon the parapet of the bridge; the figure of a woman stood within ten paces of him, her waxy-white face turned full upon him, her unwinking eyes, sparkling in the moonlight, fixed full upon his. [Illustration: "SUDDENLY SOME ONE TOUCHED OLIVER SLIGHTLY UPON THE SHOULDER."] Oliver's heart leaped within him. It was the woman whom he had seen in the streets of Flourens that night when the pretended American uncle lodged with him and his mother, and her face looked upon him now just as it had looked upon him when he peered down upon her from the garret window. He slipped from the parapet of the bridge, and, crouching in the shadow on the foot-way, ran rapidly and noiselessly away from that dreadful, impassive presence. Then, reaching the end of the bridge, and without slacking his speed, he plunged into and wound in and out through the crooked streets, leading he knew not whither. Why he ran he did not know, but something seemed to impel him onward. Suddenly he passed across another patch of moonlight, and as he ran plunging into the shadow upon the farther side, he turned his head and looked over his shoulder. A keen thrill shot through the very marrow of his bones; she was following him--silently, noiselessly, swiftly. He quickened his gait into a run, winding his way in and out through the by-ways. As he passed into and out of the dull red glare of a solitary lantern, he looked over his shoulder again. He could see that dim shape still following him, silent, ghost-like. His heart gave another great leap as it had done at first, and then began to thump against his ribs. The sweat was running down his face in streams, his breath came thick and heavy, and he felt as though he were stifling, but still he ran onward in swift headlong flight, though his feet felt heavy and leaden, as they do in a nightmare dream.