They got to the entrance to the apartment building and stepped into a dark hallway. Then quite suddenly and apparently without thought the man took a knife out of his pocket. "Suppose that man who darted into the alleyway had intended to kill us," he thought. Opening the knife he whirled about and struck his wife. He struck twice, a dozen times--madly. There was a scream and his wife's body fell. The janitor had neglected to light the gas in the lower hallway. Afterward, the foreman decided that was the reason he did it, that and the fact that the dark slinking figure of a man darted out of an alleyway and then darted back again. "Surely," he told himself, "I could never have done it had the gas been lighted." He stood in the hallway thinking. His wife was dead and with her had died her unborn child. There was a sound of doors opening in the apartments above. For several minutes nothing happened. His wife and her unborn child were dead--that was all. He ran upstairs thinking quickly. In the darkness on the lower stairway he had put the knife back into his pocket and, as it turned out later, there was no blood on his hands or on his clothes. The knife he later washed carefully in the bathroom, when the excitement had died down a little. He told everyone the same story. "There has been a holdup," he explained. "A man came slinking out of an alleyway and followed me and my wife home. He followed us into the hallway of the building and there was no light." The janitor had neglected to light the gas. Well there had been a struggle and in the darkness his wife had been killed. He could not tell how it had happened. "There was no light. The janitor had neglected to light the gas," he kept saying. For a day or two they did not question him specially and he had time to get rid of the knife. He took a long walk and threw it away into the river in South Chicago where the two abandoned coal barges lay rotting under the bridge, the bridge he had crossed when on the summer evenings he walked to the street car with the girl who was virginal and pure, who was far off and unattainable, like a star and yet not like a star. And then he was arrested and right away he confessed--told everything. He said he did not know why he had killed his wife and was careful to say nothing of the girl at the office. The newspapers tried to discover the motive for the crime. They are still trying. Some one had seen him on the few evenings when he walked with the girl and she was dragged into the affair and had her picture printed in the paper. That has been annoying for her, as of course she has been able to prove she had nothing to do with the man. * * * * *