you think it is a bite of some kind?" asked Morgan, looking keenly at her.
"I can't imagine what else it could be," she replied.
Morgan dropped her hand and looked out of the window for a moment. There was no doubt in his mind that the mark had been made by a hypodermic needle, yet it was the only mark of the kind that he could see on her arm, and therefore would hardly seem to indicate that the girl was a drug fiend. Moreover, there had bean no indication of embarrassment or nervousness in her reference to the mark, as would undoubtedly have been the case had she been addicted to the use of a drug. Morgan realized, too, that the fresh pink and white skin of this girl, and the bright eyes, could not be maintained if drugs were taken. The case was growing more puzzling every minute. Had the use of a hypodermic needle on this girl anything to do with the supposed tragedy across the hall?
After this discovery, Morgan hesitated to ask further questions at this time, so he turned to the girl again and remarked, simply, "It is possible that some kind of spider bit you in the night. If you have any peroxide in the house, I would suggest that you bathe the spot with it. And now I must be going. If I have your permission, Miss Atwood, I would like to drop in again sometime to let you know about any further discoveries I may make on this case."
"Thank you," she returned. "I shall be interested."
As he turned to say good-bye at the door, she added, apologetically, "I am sorry I had no information to give you."
"Oh, that's all right," Morgan assured her, "I appreciate your courtesy in letting me have this little chat with you." But as he drew the door to after him, Morgan smiled and said to himself, "Poor little girl; you don't realize what a lot of information you have given me."
CHAPTER V
PECULIAR FACTS
When Morgan reached the second floor on his way down, he paused a moment before Marsh's door. So far as he had gone in this case, Morgan was confronted with two factors; the connection of this man with the case, and the bearing which Miss Atwood and her father might have upon it. Without doubt, some singular conditions surrounded the Atwoods, but his knowledge of these was still too vague to give him even a basis for reasoning. On the other hand, the questionable circumstances surrounding the connection of this man Marsh with the case, were very definite, indeed, and though Morgan tried to avoid hasty conclusions, he could not keep back his growing suspicions of Marsh. As he hesitated before Marsh's door, Morgan thought that it moved slightly. Stepping closer and pushing the door gently with an outstretched hand, he found it tightly closed. Yet, he had a feeling that the door had been softly closed after he had stopped on the landing. That decided Morgan. The time was not opportune for an interview with this man. He wanted to obtain some additional facts before taking the step he was now convinced would have to be taken, and so went on down the stairs to carry his investigations further.
Leaving the house, Morgan turned the corner of Lawrence Avenue and entered the alleyway in the rear of the Hillcrest apartments.
Practically all Chicago apartment houses have an outside rear stairway for the use of tradespeople. Usually, this stairway is open so that anything which takes place can be observed from all nearby houses. In this instance the stairway was enclosed, with a door leading to the back porch of each apartment. A person could pass from the alley up to the third floor without being noticed, even by tenants in the building itself.
Morgan instantly noted that an automobile could stand in the alleyway close to the entrance; that a person could come down these stairs unobserved, step into the car and be quietly carried away, disappearing into the general traffic of the streets in probably not more than two minutes after leaving the apartment.
Here, thought Morgan, was a possible solution of the sudden disappearance of the person who had been either murdered or wounded. It was a problem, of course, as to which door they had been brought through, and the solution of that problem would very likely bring him pretty close to the person or persons who had participated in the events of the night before.
Unquestionably, the rear door of the apartment where the trouble had taken place had not been used for this purpose, although it would seem the logical and quickest way to make an exit. On the other hand, for that very reason, the persons back of the supposed crime had been clever enough to avoid it, thus adding a mystifying element to what had taken place.
In the light of present developments, two possible exits suggested themselves to Morgan. These were the Atwood and Marsh apartments. The girl, however, claimed that she had slept through the night, and it hardly seemed possible that anyone could pass through her flat without arousing her. This, of course, meant taking for granted her story that she was alone in the apartment and had been in bed and sleeping. While Morgan felt attracted toward the girl, and placed considerable confidence in her honesty, he did not allow these emotions to entirely dull his sense of suspicion. If things did not clear themselves shortly he would carry his investigations further along this line.
In the meantime, his distrust centered on the Marsh apartment. This man admitted being awake during the reported struggle, and there was no question about his being partly dressed and in action while some of the events were taking place. Marsh could easily have passed a person or a body to a confederate through his back door, locked the door and then hurried into Sheridan Road to direct the attention of the police, or any other persons who had been aroused, to the front of the house, thus enabling his confederate to get quietly, safely and quickly away. This was only bare theory on Morgan's part. He needed definite facts to either confirm this theory, or to prove that his judgment was at fault. The cuff button, with its initial "M," looked curiously like one of these facts, and, taken in connection with the other circumstances, pointed strongly toward Marsh.
He wanted to know more about Marsh, and the girl had given him some basic facts which would enable him to enlarge his fund of information. The owner, or the real estate agent who managed the building, seemed to be the logical starting point for securing this information. To find out the names of these people must be his next step.
Luckily, at this moment the janitor of the apartment building appeared, rolling a barrel of ashes up from the basement. While it was quite obvious that such was the case, Morgan opened the conversation by inquiring, "Are you the janitor of this flat house?"
"Yes, sir," replied the man.
"Does the owner run this building, or has he placed an agent in charge?"
"A real estate agent manages it," the janitor informed him. "Parker Cole—over on Broadway."
"Thanks," said Morgan, and returned down the alley to Lawrence Avenue where he turned west and walked over to Broadway. A few minutes later he stood at the counter in the real estate office, and a man approached him.
"Is either Mr. Parker or Mr. Cole in?"
"I am Mr. Cole," announced the man. "What can I do for you?"
Morgan opened his coat a minute to give Cole a glimpse of his badge; then said, "I would like to talk confidentially with you for a few minutes."
"Step into my private office," directed Cole, opening a gate as he spoke, and indicating a space partitioned
