Vance crushed out his cigarette and folded his arms on the table.
“We begin with my quartet of possibilities—Mannix, Cleaver, Lindquist, and Spotswoode. Realizing, as I did, that the crime was carefully planned with the sole object of murder, I knew that only some one hopelessly ensnared in the lady’s net could have done it. And no suitor outside of my quartet could have been thus enmeshed, or we would have learned of him. Therefore, one of the four was guilty. Now, Lindquist was eliminated when we found out that he was bedridden in a hospital at the time of Skeel’s murder; for obviously the same person committed both crimes——”
“But,” interrupted Markham, “Spotswoode had an equally good alibi for the night of the Canary’s murder. Why eliminate one and not the other?”
“Sorry, but I can’t agree with you. Being prostrated at a known place surrounded by incorruptible and disinterested witnesses, both preceding and during an event, is one thing; but being actually on the ground, as Spotswoode was that fatal evening, within a few minutes of the time the lady was murdered, and then being alone in a taxicab for fifteen minutes or so following the event—that is another thing. No one, as far as we know, actually saw the lady alive after Spotswoode took his departure.”
“But the proof of her having been alive and spoken to him is incontestable.”
“Granted. I admit that a dead woman doesn’t scream and call for help, and then converse with her murderer.”
“I see.” Markham spoke with sarcasm. “You think it was Skeel, disguising his voice.”
“Lord no! What a priceless notion! Skeel didn’t want any one to know he was there. Why should he have staged such a masterpiece of idiocy? That certainly isn’t the explanation. When we find the answer it will be reasonable and simple.”
“That’s encouraging,” smiled Markham. “But proceed with your reasons for Spotswoode’s guilt.”
“Three of my quartet, then, were potential murderers,” Vance resumed. “Accordingly, I requested an evening of social relaxation, that I might put them under the psychological microscope, as it were. Although Spotswoode’s ancestry was wholly consistent with his having been the guilty one, nevertheless I confess I thought that Cleaver or Mannix had committed the crime; for, by their own statements, either of them could have done it without contradicting any of the known circumstances of the situation. Therefore, when Mannix declined your invitation to play poker last night, I put Cleaver to the first test. I wig-wagged to Mr. Allen, and he straightway proceeded to perform his first feat of prestidigitation.”