"He must have been very much absorbed in what he was doing," suggested Sir James.
Malcolm Sage shook his head, and for a few seconds gazed at the photographs before him.
"You will remember there was nothing on the table in front of him. I shall come to that presently. It is very unlikely that a man sitting at a table would not be conscious of someone approaching him from behind, no matter how quietly he stepped, unless that man's presence in the room were quite a normal and natural thing. That gave me the clue to Peters. He is the only person who could be in the library without Challoner taking any notice of him. Consequently it was easy for him to approach his master and shoot him."
"But the locked door, sir," said Thompson.
"That is a very simple matter. An ordinary lead-pencil, with a piece of string tied to one end, put through the ring of the key to act as a lever, the cord being passed beneath the door, will lock any door in existence. The pencil can then be drawn under the door. This will show how it's done." Malcolm Sage reached across for a sheet of paper, and drew a rough sketch.
[Illustration]
"That is why you examined the under-edge of the door?" suggested Sir
James.
Malcolm Sage nodded. "The marks of the cord were clearly defined and reflected in the mirror. Had the key not been touched, it would have helped."
"How?" asked Inspector Wensdale.
"By means of the string the key is turned only just to the point where the lever falls through the hole to the floor. The fingers would turn beyond that point, not being so delicate."
"Mr. Sage, you're a wonder," burst out the inspector.
"I then," proceeded Malcolm Sage, "examined all the other doors in the house, and I found that of one room, which I after discovered to be Peters', was heavily scored at the bottom. He had evidently practised fairly extensively before putting the plan into operation. He had also done the same thing with the library door, as there were marks of more than one operation. Furthermore, he was wiser than to take the risk of so clumsy a tool as a lead-pencil. He used this."
Malcolm Sage drew from his pocket the roll of twine with the thin steel instrument down the centre. It was a canvas-needle, to the eye of which the cord was attached.
"This was absolutely safe," he remarked. "Another thing I discovered was that one lock, and only one lock in the house, had recently been oiled—that of the library-door."
Sir James nodded his head several times. There was something of self-reproach in the motion.
"Now," continued Malcolm Sage, "we come back to why a man should be sitting at a table absorbed in gazing at nothing, and at a time when most of the household are either in bed or preparing for bed."
"Peters said that he was checking his pass-book," suggested Sir
James.
"That is undoubtedly what he was doing," continued Malcolm Sage, "and Peters removed the passbook, put it in a drawer, first destroying the cancelled cheques. He made a blunder in not replacing the pass-book with something else. That was the last link in the chain," he added.
"I don't quite see——" began Sir James.
"Perhaps you did not read of a case that was reported from New York some eighteen months ago. It was very similar to that of Mr. Challoner. A man was found shot through the head, the door being locked on the inside, and a verdict of suicide was returned; but there was absolutely no reason why he should have taken his life.
"What actually happened was that Mr. Challoner went to his bank to draw five hundred pounds with which he hoped to bribe his nephew's fiancée. He trusted to the temptation of the actual money rather than a cheque. When he was at the bank the manager once more asked him to return his pass-book, which had not been balanced for several months. He was very dilatory in such matters."
"That is true," said Dane, speaking for the first time.
"That evening he proceeded to compare it with his cheque-book. I suspect that Peters had been forging cheques and he saw here what would lead to discovery. Furthermore, there was a considerable sum of money in the safe, and the quarrel between uncle and nephew to divert suspicion. This, however, was mere conjecture—that trouser-pocket photo, Dawkins," said Malcolm Sage, turning to the photographer, who handed it across to him.
"Now notice the position of those keys. They are put in head foremost, and do not reach the bottom of the pocket. They had obviously been taken away and replaced in the pocket as Challoner sat there. Had he gone to the safe himself and walked back to his chair, the position of the keys would have been quite different."
Instinctively each man felt in his trousers pocket, and found in his own bunch of keys a verification of the statement.
"The whole scheme was too calculated and deliberate for an amateur," said Malcolm Sage, knocking the ashes out of his pipe on to a brass ashtray. "That is what prompted me to get the fingerprints of Peters, so that I might send them to Scotland Yard to see if anything was known of him there. The result you have seen."
"We've been on the look-out for him for more than a year," said Inspector Wensdale. "The New York police are rather interested in him about a forgery stunt that took place there some time ago."
"I am confident that when Challoner's affairs are gone into there will be certain cheques which it will be difficult to explain.
"Then, again, there was the electric light," proceeded Malcolm Sage. "A man about to blow out his brains would certainly not walk across the room, switch off the light, and then find his way back to the table."
"That's true enough," said Inspector Wensdale.
"On the other hand, a murderer, who has to stand at a door for at least some seconds, would not risk leaving on the light, which would attract the attention of anyone who might by chance be in the hall, or on the stairs."
Inspector Wensdale caught Thompson's left eye, which deliberately closed and then re-opened. There was a world of meaning in the movement.
"Well, I'm glad I didn't get you down on a fool's errand, Sage," said Sir James, rising. "I wonder what the local inspector will think."
"He won't," remarked Malcolm Sage; "that is why he assumed it was suicide."
"Did you suspect Peters was armed?" enquired Sir James.
"I saw the pistol under his left armpit," said Malcolm Sage. "It's well known with American gunmen as a most convenient place for quick drawing."
"If it hadn't been for you, Mr. Sage, he'd have got me," said
Inspector Wensdale.
"There'll be a heavy car-full for Tims," remarked Malcolm Sage, as he walked towards the door.
CHAPTER IV THE SURREY CATTLE-MAIMING MYSTERY
I
"Disguise," Malcolm Sage had once re-marked, "is the chief characteristic of the detective of fiction. In actual practise it is rarely possible. I am a case in point. No one but a builder, or an engineer, could disguise the shape of a head like mine;" as he spoke he had stroked the top of his head, which rose above his strongly-marked brows like a down-covered cone.
He maintained that a disguise can always be identified, although not necessarily penetrated. This in itself would be sufficient to defeat the end of the disguised man by rendering him an object of suspicion. Few men can disguise their walk or bearing, no matter how clever they might be with false beards, grease-paint