“Go on,” the doctor said, making no attempt to conceal his interest.
“Our friend X probably had the cord in his or her pocket and had constructed the rough tourniquet while coming along the road. Our friend X was wearing gloves, I may say.”
“How do you know that?” Ringwood asked.
“You’ll see later. Now X went up to the front door and rang the bell. The maid came along, recognised X. …”
“How do you know that?” Ringwood repeated.
“I don’t know it. I’m just giving you the hypothesis you asked for. I don’t say it’s correct. To continue: this person X inquired if Silverdale (or Mrs. Silverdale, perhaps) was at home. Naturally the maid said no. Most likely she told X that her companion had scarlatina. Then X decided to leave a note, and was invited into the house to write it. It was a long note, apparently; and the maid was told to go to the kitchen and wait till X had finished. So off she went.”
“Well?”
“X had no intention of putting pen to paper, of course. As soon as the maid was out of the way, X slipped upstairs and switched on the light in this room.”
“I’d forgotten it was the light in this window that we saw from the outside,” Dr. Ringwood interrupted. “Go on.”
“Then, very quietly, by shifting the table on the landing under the electric light, X removed the bulb that lighted the stair. One can reach it by standing on that table. Then X shifted the table back to its place. There were no fingerprints on the bulb—ergo, X must have been wearing gloves, as I told you.”
“You seem to have got a lot of details,” the doctor admitted. “But why all this manoeuvring?”
“You’ll see immediately. I think I said already that whoever did the business was a very cool and competent person. When all was ready, X attracted the maid’s attention in some way. She came to the foot of the stairs, suspecting nothing, but probably wondering what X was doing, wandering about the house. It’s quite likely that X made the sick girl upstairs the pretext for calling and wandering out of bounds. Anyhow, the maid came to the foot of the stairs and moved the switch of the landing light. Nothing happened, of course, since the bulb had been removed. She tried the switch backwards and forwards once or twice most likely, and then she would conclude that the lamp was broken or the fuse gone. Probably she saw the reflection of the light from the room-door. In any case, she came quite unsuspiciously up the stair.”
Sir Clinton paused, as though to allow the doctor to raise objections; but none came, so he continued:
“Meanwhile X had taken up a position opposite the door of the room, at the foot of the second flight of stairs. If you remember, a person crouching there in semidarkness would be concealed from anyone mounting the first flight. The tourniquet was ready, of course.”
Dr. Ringwood shuddered slightly. Apparently he found Sir Clinton’s picture a vivid one, in spite of the casual tone in which it had been drawn.
“The girl came up, quite unsuspicious,” Sir Clinton continued. “She knew X; it wasn’t a question of a street-loafer or anything of that sort. An attack would be the last thing to cross her mind. And then, in an instant, the attack fell. Probably she turned to go into the lighted room, thinking that X was there; and then the noose would be round her neck, a knee would be in her back and …”
With a grim movement, Sir Clinton completed his narrative of the murder more effectively than words could have done.
“That left X a clear field. The girl upstairs was lightheaded and couldn’t serve as a witness. X daren’t go near her for fear of catching scarlatina—and that would have been a fatal business, for naturally we shall keep our eye on all fresh scarlet cases for the next week or so. It’s on the cards that her scarlatina has saved her life.”
Dr. Ringwood’s face showed his appreciation of this point.
“And then?” he pressed Sir Clinton.
“The rest’s obvious. X came in here, hunting for something which we haven’t identified. Whatever it was, it was in this drawer and X knew where it was. Nothing else has been disturbed except slightly—possibly in a hunt for the key of the drawer in case it had been left lying around loose. Not finding the key, X broke open the drawer and then we evidently arrived. That must have been a nasty moment up here. I don’t envy friend X’s sensations when we rang the front door bell. But a cool head pulls one through difficulties of that sort. While we were standing unsuspiciously on the front door steps, X slipped downstairs, out of the back door, and into the safety of the fog-screen.”
The Chief Constable rose to his feet as he concluded.
“Then that’s what happened, you think?” Doctor Ringwood asked.
“That’s what may have happened,” Sir Clinton replied cautiously. “Some parts of it certainly are correct, since there’s sound evidence to support them. The rest’s no more than guesswork. Now I must go to the phone.”
As the Chief Constable left the room, the sick girl upstairs whimpered faintly, and Dr. Ringwood got out of his chair with a yawn which he could not suppress. He paused on the threshold and looked out across the body to the spot at the turn of the stair. Sir Clinton’s word-picture of the murderer crouching there in ambush with his tourniquet had been a little too vivid for the doctor’s imagination.
V
The Bungalow Tragedy
In the course of his career, Sir Clinton Driffield had found it important to devote some attention to his outward appearance; but his object
