“You see what this book means, Markham? Chester was sitting here reading when the murderer came in. Yet he did not so much as rise or call out. Furthermore, he let the intruder stand directly in front of him. He did not even lay down his book, but sat back in his chair relaxed. Why? Because the murderer was some one Chester knew—and trusted! And when the gun was suddenly brought forth and pointed at his heart, he was too astounded to move. And in that second of bewilderment and unbelief the trigger was pulled and the bullet entered his heart.”
Markham nodded slowly, in deep perplexity, and Heath studied the attitude of the dead man more closely.
“That’s a good theory,” the Sergeant conceded finally. “Yes, he musta let the bird get right on top of him without suspecting anything. Same like Julia did.”
“Exactly, Sergeant. The two murders constitute a most suggestive parallel.”
“Still and all, there’s one point you’re overlooking.” Heath’s brow was roughened in a troubled frown. “Chester’s door mighta been unlocked last night, seeing as he hadn’t gone to bed, and so this person coulda walked in without any trouble. But Julia, now, was already undressed and in bed; and she always locked her door at night. Now, how would you say this person with the gun got into Julia’s room, Mr. Vance?”
“There’s no difficulty about that. Let us say, as a tentative hypothesis, that Julia had disrobed, switched off the lights, and climbed into her queenly bed. Then came a tap on the door—perhaps a tap she recognized. She rose, put on the lights, opened the door, and again repaired to her bed for warmth while she held parley with her visitor. Maybe—who knows?—the visitor sat on the edge of the bed during the call. Then suddenly the visitor produced the revolver and fired, and made a hurried exit, forgetting to switch the lights off. Such a theory—though I don’t insist on the details—would square neatly with my idea regarding Chester’s caller.”
“It may’ve been like you say,” admitted Heath dubiously. “But why all the hocus-pocus when it came to shooting Ada? That job was done in the dark.”
“The rationalistic philosophers tell us, Sergeant”—Vance became puckishly pedantic—“that there’s a reason for everything, but that the finite mind is woefully restricted. The altered technic of our elusive culprit when dealing with Ada is one of the things that is obscure. But you’ve touched a vital point. If we could discover the reason for this reversal of our inconnu’s homicidal tactics, I believe we’d be a lot forrader in our investigation.”
Heath made no reply. He stood in the centre of the room running his eye over the various objects and pieces of furniture. Presently he stepped to the clothes-closet, pulled open the door, and turned on a pendant electric light just inside. As he stood gloomily peering at the closet’s contents there was a sound of heavy footsteps in the hall and Snitkin appeared in the open door. Heath turned and, without giving his assistant time to speak, asked gruffly:
“How did you make out with those footprints?”