subject of abnormal psychology. "What interests me just now is the way all these fellows' stories hang together."
"Yes," nodded Markham. "There is undeniably a groundwork of truth in their statements."
"But please observe," Vance pointed out, "that their stories do not eliminate any one of them as a possible culprit. Their tales, as you say, synchronize perfectly; and yet, despite all that neat co-ordination, any one of the three could have got into the Odell apartment that night. For instance: Mannix could have entered from Apartment 2 before Cleaver came along and listened; and he could have seen Cleaver going away when he himself was leaving the Odell apartment.—Cleaver could have spoken to the doctor at half past eleven, walked to the Ansonia, returned a little before twelve, gone into the lady's apartment, and come out just as Mannix opened Miss Frisbee's door.—Again, the excitable doctor may have gone in after Spotswoode came out at half past eleven, stayed twenty minutes or so, and departed before Cleaver returned from the Ansonia. . . . No; the fact that their stories dovetail doesn't in the least tend to exculpate any one of them."
"And," supplemented Markham, "that cry of 'Oh, my God!' might have been made by either Mannix or Lindquist—provided Cleaver really heard it."
"He heard it unquestionably," said Vance. "Some one in the apartment was invoking the Deity around midnight. Cleaver hasn't sufficient sense of the dramatic to fabricate such a thrillin' bonne-bouche."
"But if Cleaver actually heard that voice," pro-
