going to devote it to the restful pursuit of his favorite amusement—reading.
His mother, a white-haired, pleasant faced little woman, entered the room.
"Dave," she reminded him, "here's the morning paper. You forgot to look it over at breakfast."
"I know, Mother," he returned, "but I wanted to forget all about the world this morning. That Brock case has tired me out."
"But," she protested, "I notice from the headlines that there was a big murder on Sheridan Road last night. I didn't think you'd want to miss the details of that."
Professional instinct was too strong. Morgan reached for the paper and glanced quickly over the glaring headlines and the few words below, while the mother proudly watched him.
Morgan made a good figure for a detective. Not so tall as to be conspicuous, his breadth of shoulder and depth of chest clearly showed that he possessed the strength to meet most of the emergencies into which his work might lead him. His face had none of the hardened sharpness that usually marks the detective. In fact, although he was nearly thirty, his face still had a boyish look that made him appear younger, and taken with his sleek dark hair and mild brown eyes one would have presumed him to be just an average young business man rather than a hunter of criminals.
"No details here," he said, a moment later, laying the paper on the table. "They evidently received the notice just before going to press. Anyway, there is seldom much mystery about a murder. The men in that precinct probably have a line on who did it by this time."
"Yes, I know they use my boy only for the big cases," asserted the mother, and giving him an affectionate pat on the head, she went to her housework, while Morgan took a book from one of the cases, refilled his pipe, and settled down to spend a quiet morning in the big chair.
At eleven o'clock the telephone bell rang. Only a few words passed between Morgan and his caller, but the detective's face lighted up with interest. The instant he replaced the receiver he sprang to his feet, went to his bedroom, and hurriedly changed his clothes.
"Mother," he called. "The Chief has just 'phoned me that they have the biggest case for me that I ever handled. I must go down at once."
His mother came to the door of the room. "Can't you even wait for a bite of lunch?" she questioned.
"No," he explained, "it is a hurry call. The Chief says we cannot lose a minute in getting started. I'll have to stop in somewhere after I see the Chief."
Kissing his mother good-bye, Morgan hurried around to the elevated station. Fifteen minutes later he opened the Chief's office door.
"Sit down, Morgan," said the Chief, waving his hand toward a chair. "I've got a case here that'll make even you go some."
As Morgan sat down the Chief gathered up some typewritten sheets from his desk, and continued; "I didn't like to break up the first day you've had off in a long time, Morgan, but there was a murder on Sheridan Road last night—or early, this morning, to be exact—that has put a real mystery up to the Department. It'll need a man like you to solve it—if it can be solved. The newspapers had big headlines this morning, and the public will be watching us on account of the peculiar nature of the crime."
"I saw something about it in my paper this morning," said Morgan. "There were no details, however. The notice probably caught the last edition with little more than the fact that a murder had been committed."
"Well," exclaimed the Chief, "it's one of the biggest mysteries we've ever had handed to us. The shot was heard by both the man on the beat and a tenant in the building, but outside of the stories of these two men, and the discovery of a blood stain on a rug in a supposedly empty flat, not another thing has been found. The body is missing, and there is no trace of how it got out of the flat or where it is now. Here is a report of all that we know so far. By the way, your partner Tierney made this report. He happened to be on the job last night, so I told him to stick to it."
The Chief handed the typewritten sheets to Morgan.
"You will note," he went on, "that the man on beat heard a shot at about 2 A.m.; that he met a tenant from the house who said that he had heard sounds of a struggle, a shot, and something like the falling of a body. The police found the flat locked, and after they broke in could find no one on the premises. Nothing was upset, and there were no signs of the struggle, said to have taken place. Another peculiar thing is that the police even overlooked the bloodstain until the tenant who had heard the shot called their attention to it. Tierney tried to get some more details this morning, but you will find from his report that none of the other tenants admit hearing the shot; that the tenant in the flat across the hall was apparently not at home, and that the janitor says the people who rent the flat in which the trouble occurred, have been away all summer. The only really definite information of any kind comes from this one tenant, Marsh."
"You'll probably find Tierney at the flat, as I sent him back after he had turned in this report. He may have found out something more by now than he could put in that quick report."
"Chief," said Morgan, as he thumbed over the typewritten sheets in his hands, "you say there has been a murder committed here. With this tenant, Marsh, and a patrolman, getting into action so soon after the shot, a body couldn't possibly be moved out of the house—certainly, not without leaving some trace."
"Well?"
"How do we know there was a murder?"
"We don't know—positively," returned the Chief. "But we're not going to take any chances. Even if there wasn't an actual murder, SOMETHING OF A CRIMINAL NATURE WAS PULLED OFF IN THAT FLAT LAST NIGHT. What it was, we're putting up to you to find out. Go to it, Morgan! So long!"
CHAPTER III
INVESTIGATION
Leaving the Detective Bureau, Morgan stopped in a restaurant on Randolph Street for a quick lunch. From there he walked over to State Street and took the motor bus for the scene of the singular event which it was now his duty to investigate. A half-hour later he dropped off the bus at Lawrence Avenue and Sheridan Road. A few steps brought him to the Hillcrest apartments, where he found Tierney waiting on the front steps for him.
"The Chief telephoned me that you would probably be here about this time," said Tierney, after acknowledging Morgan's greeting. "I was on the job last night, and did a little investigating this morning, so the Chief thought you might want to talk things over with me."
Morgan nodded. "All right, let's go up. Can we get into the flat?"
"Sure," answered Tierney. "We put a temporary padlock on this morning, and I have the key."
Without further words the two men climbed the stairs to the apartment on the third floor. Tierney unlocked the padlock and they went in. Inside the entrance hall of the apartment, Tierney turned to Morgan.
"I suppose the Chief has put the case entirely in your hands, so it's up to you what you want to do first."
"We had better go into the front room here," answered Morgan, "and let me get a line on things. About all I know so far is that somebody THINKS a murder has been committed."
"You can't make much out of things as they are, that's a fact," assented Tierney, as they moved into the front room. He dropped into an easy chair close at hand, and pushed his cap back on his head, while Morgan went to one of the front windows and ran the shade to the top. Seating himself where he could get the full benefit of the light from the window, he drew out the typewritten report and read it over carefully.
"This is your report, isn't it, Tierney?" he inquired, folding up the sheets again and replacing