Stepany nodded. “I agree with Wallace as to the nature of the problem, and even the method – however, the bolt must be held back before the key can fall in place. This means that a clamp must be placed over the lock before Mrs Griever releases the button to let in the murderer. Then the deed is done, the clamp is removed – the bolt still being held in – and then the door is closed, using a credit card in the manner Baines has suggested.”
Jordon examined the door, the lock, and the doorjamb. “I think I see a problem, old fellow. The lip on the doorjamb is at least three quarters of an inch thick, and fitted with a rubber molding. If the door fits snugly, I don’t see how one could pull the card free. Since the lip extends around the entire door, including the bottom, that would appear to exclude using a string on the card and pulling it through in some other place.”
Stepany pushed the button, held the bolt in with his thumb, then released the button. The bolt immediately slammed back into an extended position. “Dear me!” Stepany waved his hand. “The spring driving that bolt is certainly a strong one. I couldn’t hold it.” He smiled. “I suppose that shoots me down, even if the card could be pulled through the doorjamb. If that bolt is to be held open, it would have to be done electrically.”
Jordon nodded. “I agree. And, where something as thick as a credit card might not have made it, a pair of strong thin wires probably could. If the murderer placed a battery on the hall floor, gained entrance to the room, chocked open the door, then did the deed, he could run his wires through the hinged side of the opening, connect into the circuit where the wire jumps the gap between the baseboard and the door, and thus hold the lock open. Then he closes the door and pulls the wires after him, breaking the circuit and thereby closing the bolt.”
Humpheries shook his head, went to the door of the room, and stooped to examine the wire where it jumped the hinge between the baseboard and door. “See here, Malcolm. The insulation on the wire hasn’t been disturbed.” He stood and examined the contacts to the solenoid. “Hmmm. He could have connected here, then pulled the wires out.”
Sims-Danton held out a hand. “Gentlemen, the scheme now being pondered requires just the sort of equipment the police were looking for when they searched the rest of the house.”
Humpheries stood. “Yes, Evan, but a battery and two lengths of wire can be made to appear very innocent. For example, the battery could easily be put into a radio or some other appliance. The wires could be tucked into a television set or just hidden in some small niche.”
He smirked. “As we all know, gentlemen, the usual run of police inspector is not terribly bright. Could we send Collins for wires and a battery?”
After a few moments, equipment in hand, Humpheries nodded his thanks and Collins left the room. He removed the insulation from the tips of two lengths of steel bell wire, screwed the ends of the pair to a large dry-cell battery, then carried it to the “outside” of the unbroken door. “Very well – if one of you will play Mrs Griever and push the button, I will show you how it was done.”
Jordon reached out a hand and pushed the button set in the doorjamb. The lock buzzed and clicked open, then Humpheries pushed the door open and turned to Baines. “Wallace, old man, would you play the door chock and hold it open?”
“Yes, of course.” Baines held the door open while Humpheries stepped through, carrying the wired battery.
“Now, gentlemen, I move to the bed, kill the victim, rush back, and attach these leads.” He frowned at Jordon. “Release the button.”
Jordon removed his finger from the button. “Sorry.”
With the bolt extended, Humpheries bent one of the leads around one of the solenoid contacts. “And now, the other.” As soon as he touched the second lead to the second solenoid contact, the lock buzzed, retracting the bolt. He bent the lead around the second contact and, still holding the battery, stepped through the door. “Now I remove the chock and close the door.” The door closed on the wires and the lock controlled by the doorknob caught, while the solenoid lock remained retracted. “Now all I do is pull the wires through-” Humpheries grunted as he tugged at the wires. “Drat! That door does have a snug fit, doesn’t it?” One last grunt and the solenoid de-energized, slamming the bolt home.
Jordon laughed. “Good show! Well done, Humpheries.”
Sims-Danton pointed at the solenoid contacts. The wires were still attached. Humpheries walked around the door, sheepishly holding out the battery.
“I’m afraid I broke the wires.”
Sims-Danton rubbed his chin. “Charles, try it again, but don’t let the door latch. Leave it open just enough to pull the wires through.”
The experiment was repeated, with the door held open a bit. As the wires were pulled from the solenoid, the bolt shot home, forcing the door to shut on the wires. “It’s no use. I pulled them as fast as I could, but it’s just not fast enough.”
Sims-Danton pulled the door open. “Hook it up and try it again – but this time open the door a little further.”
The experiment was repeated but, instead of forcing the door shut, the bolt forced the door open. “Hmmm. That would never do.” Sims-Danton again pressed the button and opened the door. “The taper on the bolt seems to do it. When the door is in an approximate position, the bolt shoots for the bolt hole and either finds its way in, forcing the door closed, or hits the sharp edge of this lip, forcing the door open.” He closed the door, released the button, and shrugged. “I’m afraid that exhausts my theory as well.” He faced Nathan. “In which case, Mr Griever, it looks as though Slaughterhouse has another member.”
Nathan beamed but, feeling reckless, shook his head. “Sir James hasn’t had a crack at it yet.”
Cockeral cleared his throat. “Nate, you must understand that I am your sponsor. It wouldn’t be proper for me to make an attempt against my own candidate.”
Nathan shrugged and held out his hands. “Please – I insist.”
The membership looked at Sir James, who smiled and turned toward Nathan. “Very well, then. I’ll take a crack at it. Most of the solutions thus far appear to take up too much time. How long does it take to run from the kitchen, through the dining room and hall, then up the stairs to the bedroom door?”
Sims-Danton pulled out his notebook. “According to the police investigation, at the most Mr Griever would have fourteen to sixteen seconds from the time of the shooting to place the gun in the victim’s hand, leave the room, and make it into his own bedroom. One of the officers making the run did it in eleven seconds, but he was, I gather, an exceptional athlete.”
Sir James nodded. “That would appear to preclude anything complicated and time-consuming. If he used any extra equipment, I can’t imagine where he could have put it. He would only have time enough to get to his room before he had to turn around and come out to meet Angela, thereby making it appear that he too had been drawn by the sound of the shot.” He turned to Nathan. “Tell me, Nate – what physical shape was Angela in – old, young, slender, obese?”
“She was twenty-nine, but quite plump.”
Sir James nodded. “Then, for the sake of argument, let’s say the sixteen-second run was what she made.” He went to the side of the bed. “Therefore, within sixteen seconds he had to place the gun in the victim’s hand – say four seconds. Then he had to traverse the distance from the bed to the door.” Sir James turned to Jordon. “Give it a try, will you, old man? I’ll keep your time.”
“Of course.” Jordon moved to the side of the bed.
Sir James examined his watch. “Go!”
Jordon ran to the door and opened it, stepped through, and let the door close behind him. He opened the door and looked through. “How did I do?”
Sir James nodded. “Three seconds.” He turned to Sims-Danton. “Do we have the hallway outside the bedroom plotted? I would like to time a run from Mrs Griever’s door to Mr Griever’s door.”