She lowered her veil and went out. Algarcife stood at the window and heard her footsteps as she descended the stairs. He saw her leave the house, pause for an instant to greet Signor Morani, give the black bag into his hands, and enter the carriage. As she sat down, she leaned out for an instant and glanced up to where he stood. Then the carriage started, turned the corner, and was gone. Still he did not leave the window. He stood motionless, his head bent, looking down into the heated streets, across which were stretching the slanting shadows from the west. A splash of scarlet, like the impress of a bloody hand, projected above the jagged line of tenement roofs, while a film of rising smoke obscured its lurid distinctness. He felt that complete sense of isolation, that loss of connection with the chain of humanity which follows a separation from one who has shared with us, night and day, the commonplaces of existence. The past and future seemed to have clashed together and shattered into the present. In the street below men and women were going homeward from the day's work. He noticed that they wore, one and all, an aspect of despair, as if passing automatically along the endless round of a treadmill. He felt a vague wonder at the old, indomitable instinct of the preservation of self which seemed so alien to his mood. Situated as he was above it all, humanity assumed to his indifferent eyes a comic effect, and he found himself laughing cynically at the moving figures that blocked the sidewalk below. A physical disgust for the naked facts of life attacked him like nausea. The struggle for existence, the propagation of the species, the interminable circle of birth, marriage, and death, appeared to him in revolting bestiality. In his bodily and mental wreckage, all action became repellent and hideous, and the slanting sun-rays bespattering the human atoms in the street produced a giddiness in his brain. At that moment he was in the throes of a mental revolution, and his old philosophic sanity was ingulfed.