"He said he had called for Father at eleven o’clock, as he had been instructed to do, and they started for home. Just as they reached Oak Street something went wrong with the motor. The chauffeur spent a half-hour trying to discover the trouble and he says that Father grew very impatient. Father, it seems, tried to get a taxicab, but all the cabs that passed were going north and had people in them. You know it is not much of a walk from Oak Street up to the house, and the chauffeur said that Father finally told him to take his time in fixing the car and he would walk home. The chauffeur saw him start off up the Lake Shore Drive and that was the last anyone saw or heard of Father until he was found on our steps this morning." Forrester’s thoughts reverted to the car which had followed him through the fog. There was little doubt in his mind that this same car had followed the elder Nevins, waiting for the opportunity to strike. Forrester did not question that the banker’s murderers were in that car now. At this very moment they might be waiting outside for Forrester to reappear. It flashed through his mind what a simple matter it would be for him to notify the police and have them ready when he started out. "Mother," said Forrester, "how soon do you expect to go home?" "I suppose we could leave at any time now, Son," replied Mrs. Forrester. "How did you plan to go home? I did not see the car outside when I came in." "No," explained Mrs. Forrester, "it was such a pleasant evening that I told William he need not return. After the excitement and worry we have been through I thought it would be good for us to walk home." "It is not at all nice out now," said Forrester. "A heavy fog has come up. I think I would better call a taxicab." Forrester went to the telephone and ordered a taxicab. Then he whispered to Nevins, "May I use a phone upstairs where I can talk without being overheard?" "Yes," informed Nevins, "you will find a phone in Father’s room." Forrester went upstairs and called police headquarters. He briefly explained who he was, what had occurred on his walk over, and suggested that they watch for the strange car as he returned home. "Leave the house in exactly fifteen minutes," instructed the man at headquarters, "and we’ll be ready for you." After returning to the library Forrester took an occasional surreptitious look at his watch and was pleased to hear the taxi driver ring the door-bell just as the fifteen minutes expired.