girl was alive after her escort had departed. Therefore, we must conclude that the man who was already in the apartment was the person who murdered her. This conclusion is further corroborated by Doctor Doremus's report that the crime occurred between eleven and twelve. But since her escort did not leave till half past eleven, and spoke with her after that time, we can put the actual hour of the murder as between half past eleven and midnight. . . . These are the inferable facts from the evidence thus far adduced."
"There's not much getting away from 'em," agreed Heath.
"At any rate, they're interestin'," murmured Vance.
Markham, walking up and down earnestly, continued:
"The features of the situation revolving round these inferable facts are as follows:—There was no one hiding in the apartment at seven o'clock—the hour the maid went home. Therefore, the murderer entered the apartment later. First, then, let us consider the side door. At six o'clock—an hour before the maid's departure—the janitor bolted it on the inside, and both operators disavow emphatically that they went near it. Moreover, you, Sergeant, found it bolted this morning. Hence, we may assume that the door was bolted on the inside all night, and that nobody could have entered that way. Consequently, we are driven to the inevitable alternative that the murderer entered by the front door. Now, let us consider this other means of entry. The phone operator who was on duty until ten o'clock last night
