We plunged down Montgomery Street in the teeth of the wind that dashed the spray in our faces at one moment, lulled an instant the better to deceive the unwary, and then leaped at us from behind corners with the impetuous rush of some great animal that turned to vapor as it reached us. The street was dark except for the newspaper offices, which glowed bright with lights on both sides of the way, busy with the only signs of life that the storm and the midnight hour had left. With the lighted buildings behind us we turned down California Street. Half-way down the block, in front of the Merchants' Exchange, stood a hack. At the sight my heart beat fast and my breath came quick. Here, perhaps, was the person about whom centered so many of my hopes and fears, in whose service I had faced death, and whose words might serve to make plain the secret springs of the mystery. As we neared the hack my guide gave a short, suppressed whistle, and passing before me, flung open the door to the vehicle and motioned me to enter. I glanced about with some lack of confidence oppressing my spirits. But I had gone too far to retreat, and stepped into the hack. Instead of following, the guide closed the door gently; I heard him mount the seat by the driver, and in a moment we were in motion. Was I alone? I had expected to find the Unknown, but the dark interior gave no sign of a companion. Then the magnetic suggestion of the presence of another came to my spirit, and a faint perfume put all my senses on the alert. It was the scent that had come to me with the letters of the Unknown. A slight movement made me certain that some one sat in the farther corner of the carriage. Was it the Unknown or some agent? And if it proved to be the Unknown, was she the lady I had met in cold business greeting in the courtyard of the Palace Hotel? I waited impatiently for the first street-lamp to throw a gleam of light into the carriage. But when it came I was little the wiser. I could see faintly the outlines of a figure shrouded in black that leaned in the corner, motionless save for the swaying and pitching of the hack as it rolled swiftly down the street. The situation became a little embarrassing. Was it my place to speak first? I wondered. At last I could endure the silence no longer. “Quite an unpleasant evening,” I remarked politely. There was a rustle of movement, the sound of a short gasp, and a soft, mournful voice broke on my ear. “Mr. Dudley--can you forgive me?” The astonishment I felt to hear my own name once more--the name that seemed now to belong to a former state of existence--was swallowed up as the magnetic tones carried their revelation to my mind. I was stricken dumb for a moment at the discovery they had brought. Then I gasped: “Mrs. Knapp!” “Yes, Mrs. Knapp,” she said with a mournful laugh. “Did you never suspect?” I was lost in wonder and confusion, and even yet could not understand.