"Entrance into his apartment was affected by an expert cracksman, the New York police say. Schurman had a small safe. The marks on the safe and the method in which entrance was affected makes the police believe that they may be able to find the man. "There was an additional factor. There was a small electric refrigerator which was open when the body was found. There were some soiled dishes on the table in the kitchen. It appeared that an enormous quantity of food had been eaten. On one of the shelves of the refrigerator there was an apple, a green apple in which there were teeth marks. "Someone had evidently bitten into this apple and found it too green for eating. The maid, who came to the apartment once a day to clean up, was able to estimate the amount of food that had been eaten since she had last visited the place. Six eggs were eaten at this meal. "This woman found Schurman's body yesterday morning. The condition of the body showed that it had been dead nearly twenty-four hours. The condition of the stomach showed that he had not eaten for about six hours prior to death, and no eggs then. A quick search by the police placed him in a small restaurant near his apartment, about two o'clock on the morning he was found. Thus it may be assumed that the person who murdered Schurman is the person who consumed that enormous amount of food. The police say they have one additional bit of evidence they would rather not divulge." At this point in the recital McGuire jumped up. His features were alight with a mixture of ferocity and the zeal of the hunter. He growled: "The bird who did that left his visiting card!" All eyes were turned in his direction. He continued: "Cracksmen, criminals of all kinds have their idiosyncrasies, their peculiarities. They do certain things and thus leave a broad trail for the police to follow. The police know these peculiarities, they have a record of them. Here is a bird who does an unusual thing, he eats an enormous quantity of food. He is an expert; he has probably done it before. The police are sure to get him. During my tenure of office as Police Commissioner of New York, I have seen it work out this way lots of times. They never learn, the criminals don't; they never learn." McCall nodded. "You're right, Commissioner. Professor Brierly suggested that yesterday, when he was discussing the murder of Morris Miller. The murderer in that case left even more pronounced clues than this one you are now discussing. Professor Brierly then said that the police must surely have a record of a man who does things in such a way." "Sure to have," responded McGuire. He arose and stretched his short huge bulk. "This is something like it. We now have something tangible, something definite. It was the damnable inaction that was beginning to get on my nerves. I'm going to use your phone, Judge."