In an upper room of an unoccupied dwelling in the part of San Francisco known as North Beach lay the body of a man, under a sheet. The hour was near nine in the evening; the room was dimly lighted by a single candle. Although the weather was warm, the two windows, contrary to the custom which gives the dead plenty of air, were closed and the blinds drawn down. The furniture of the room consisted of but three pieces--an arm-chair, a small reading-stand supporting the candle, and a long kitchen table, supporting the body of the man. All these, as also the corpse, seemed to have been recently brought in, for an observer, had there been one, would have seen that all were free from dust, whereas everything else in the room was pretty thickly coated with it, and there were cobwebs in the angles of the walls. Under the sheet the outlines of the body could be traced, even the features, these having that unnaturally sharp definition which seems to belong to faces of the dead, but is really characteristic of those only that have been wasted by disease. From the silence of the room one would rightly have inferred that it was not in the front of the house, facing a street. It really faced nothing but a high breast of rock, the rear of the building being set into a hill. As a neighboring church clock was striking nine with an indolence which seemed to imply such an indifference to the flight of time that one could hardly help wondering why it took the trouble to strike at all, the single door of the room was opened and a man entered, advancing toward the body. As he did so the door closed, apparently of its own volition; there was a grating, as of a key turned with difficulty, and the snap of the lock bolt as it shot into its socket. A sound of retiring footsteps in the passage outside ensued, and the man was to all appearance a prisoner. Advancing to the table, he stood a moment looking down at the body; then with a slight shrug of the shoulders walked over to one of the windows and hoisted the blind. The darkness outside was absolute, the panes were covered with dust, but by wiping this away he could see that the window was fortified with strong iron bars crossing it within a few inches of the glass and imbedded in the masonry on each side. He examined the other window. It was the same. He manifested no great curiosity in the matter, did not even so much as raise the sash. If he was a prisoner he was apparently a tractable one. Having completed his examination of the room, he seated himself in the arm-chair, took a book from his pocket, drew the stand with its candle alongside and began to read.