Chapter XXX. The Seventh Yew Tree
 

Detective-Inspector Wessex arrived at about five o'clock; a quiet, resourceful man, highly competent, and having the appearance of an ex- soldier. His respect for the attainments of Paul Harley alone marked him a student of character. I knew Wessex well, and was delighted when Pedro showed him into the library.

"Thank God you are here, Wessex," said Harley, when we had exchanged greetings. "At last I can move. Have you seen the local officer in charge?"

"No," replied the Inspector, "but I gather that I have been requisitioned over his head."

"You have," said Harley, grimly, "and over the head of the Chief Constable, too. But I suppose it is unfair to condemn a man for the shortcoming with which nature endowed him, therefore we must endeavour to let Inspector Aylesbury down as lightly as possible. I have an idea that I heard him return a while ago."

He walked out into the hall to make enquiries, and a few moments later I heard Inspector Aylesbury's voice.

"Ah, there you are, Inspector Aylesbury," said Harley, cheerily. "Will you please step into the library for a moment?"

The Inspector entered, frowning heavily, followed by my friend.

"There is no earthly reason why we should get at loggerheads over this business," Harley continued; "but the fact of the matter is, Inspector Aylesbury, that there are depths in this case to which neither you nor I have yet succeeded in penetrating. You have a reputation to consider, and so have I. Therefore I am sure you will welcome the cooperation of Detective-Inspector Wessex of Scotland Yard, as I do."

"What's this, what's this?" said Aylesbury. "I have made no application to London."

"Nevertheless, Inspector, it is quite in order," declared Wessex. "I have my instructions here, and I have reported to Market Hilton already. You see, the man you have detained is an American citizen."

"What of that?"

"Well, he seems to have communicated with his Embassy." Wessex glanced significantly at Paul Harley. "And the Embassy communicated with the Home Office. You mustn't regard my arrival as any reflection on your ability, Inspector Aylesbury. I am sure we can work together quite agreeably."

"Oh," muttered the other, in evident bewilderment, "I see. Well, if that's the way of it, I suppose we must make the best of things."

"Good," cried Wessex, heartily. "Now perhaps you would like to state your case against the detained man?"

"A sound idea, Wessex," said Paul Harley. "But perhaps, Inspector Aylesbury, before you begin, you would be good enough to speak to the constable on duty at the entrance to the Tudor garden. I am anxious to take another look at the spot where the body was found."

Inspector Aylesbury took out his handkerchief and blew his nose loudly, continuing throughout the operation to glare at Paul Harley, and finally:

"You are wasting your time, Mr. Harley," he declared, "as Detective- Inspector Wessex will be the first to admit when I have given him the facts of my case. Nevertheless, if you want to examine the garden, do so by all means."

He turned without another word and stamped out of the library across the hall and into the courtyard.

"I will join you again in a few minutes, Wessex," said Paul Harley, following.

"Very good, Mr. Harley," Wessex answered. "I know you wouldn't have had me down if the case had been as simple as he seems to think it is."

I joined Harley, and we walked together up the gravelled path, meeting Inspector Aylesbury and the constable returning.

"Go ahead, Mr. Harley!" cried the Inspector. "If you can find any stronger evidence than the rifle, I shall be glad to take a look at it."

Harley nodded good-humouredly, and together we descended the steps to the sunken garden. I was intensely curious respecting the investigation which Harley had been so anxious to make here, for I recognized that it was associated with something which he had seen from the window of Camber's hut.

He walked along the moss-grown path to the sun-dial, and stood for a moment looking down at the spot where Menendez had lain. Then he stared up the hill toward the Guest House; and finally, directing his attention to the yews which lined the sloping bank:

"One, two, three, four," he counted, checking them with his fingers-- "five, six, seven."

He mounted the bank and began to examine the trunk of one of the trees, whilst I watched him in growing astonishment.

Presently he turned and looked down at me.

"Not a trace, Knox," he murmured; "not a trace. Let us try again."

He moved along to the yew adjoining that which he had already inspected, but presently shook his head and passed to the next. Then:

"Ah!" he cried. "Come here, Knox!"

I joined him where he was kneeling, staring at what I took to be a large nail, or bolt, protruding from the bark of the tree.

"You see!" he exclaimed, "you see!"

I stooped, in order to examine the thing more closely, and as I did so, I realized what it was. It was the bullet which had killed Colonel Menendez!

Harley stood upright, his face slightly flushed and his eyes very bright.

"We shall not attempt to remove it, Knox," he said. "The depth of penetration may have a tale to tell. The wood of the yew tree is one of the toughest British varieties."

"But, Harley," I said, blankly, as we descended to the path, "this is merely another point for the prosecution of Camber. Unless"--I turned to him in sudden excitement, "the bullet was of different--"

"No, no," he murmured, "nothing so easy as that, Knox. The bullet was fired from a Lee-Enfield beyond doubt."

I stared at him uncomprehendingly.

"Then I am utterly out of my depth, Harley. It, appears to me that the case against Camber is finally and fatally complete. Only the motive remains to be discovered, and I flatter myself that I have already detected this."

"I am certainly inclined to think," admitted Harley, "that there is a good deal in your theory."

"Then, Harley," I said in bewilderment, "you do believe that Camber committed the murder?"

"On the contrary," he replied, "I am certain that he did not."

I stood quite still.

"You are certain?" I began.

"I told you that the test of my theory, Knox, was to be looked for in the seventh yew from the northeast corner of the Tudor garden, did I not?"

"You did. And it is there. A bullet fired from a Lee-Enfield rifle; beyond any possible shadow of doubt the bullet which killed Colonel Menendez."

"Beyond any possible shadow of doubt, as you say, Knox, the bullet which killed Colonel Menendez."

"Therefore Camber is guilty?"

"On the contrary, therefore Camber is innocent!"

"What!"

"You are persistently overlooking one little point, Knox," said Harley, mounting the steps on to the gravel path. "I spoke of the seventh yew tree from the northeast corner of the garden."

"Well?"

"Well, my dear fellow, surely you observed that the bullet was embedded in the ninth?"

I was still groping for the significance of this point when, re- crossing the hall, we entered the library again, to find Inspector Aylesbury posed squarely before the mantelpiece stating his case to Wessex.

"You see," he was saying, in his most oratorical manner, as we entered, "every little detail fits perfectly into place. For instance, I find that a woman, called Mrs. Powis, who for the past two years had acted as housekeeper at the Guest House and never taken a holiday, was sent away recently to her married daughter in London. See what that means? Her room is at the back of the house, and her evidence would have been fatal. Ah Tsong, of course, is a liar. I made up my mind about that the moment I clapped eyes on him. Mrs. Camber is the only innocent party. She was asleep in the front of the house when the shot was fired, and I believe her when she says that she cannot swear to the matter of distance."

"A very interesting case, Inspector," said Wessex, glancing at Harley. "I have not examined the body yet, but I understand that it was a clean wound through the head."

"The bullet entered at the juncture of the nasal and frontal bones," explained Harley, rapidly, "and it came out between the base of the occipital and first cervical. Without going into unpleasant surgical details, the wound was a perfectly straight one. There was no ricochet."

"I understand that a regulation rifle was used?"

"Yes," said Inspector Aylesbury; "we have it."

"And at what range did you say, Inspector?"

"Roughly, a hundred yards."

"Possibly less," murmured Harley.

"Hundred yards or less," said Wessex, musingly; "and the obstruction met with in the case of a man shot in that way would be--" He looked towards Paul Harley.

"Less than if the bullet had struck the skull higher up," was the reply. "It passed clean through."

"Therefore," continued Wessex, "I am waiting to hear, Inspector, where you found the bullet lodged?"

"Eh?" said the Inspector, and he slowly turned his prominent eyes in Harley's direction. "Oh, I see. That's why you wanted to examine the Tudor garden, is it?"

"Exactly," replied Harley.

The face of Inspector Aylesbury grew very red.

"I had deferred looking for the bullet," he explained, "as the case was already as clear as daylight. Probably Mr. Harley has discovered it."

"I have," said Harley, shortly.

"Is it the regulation bullet?" asked Wessex.

"It is. I found it embedded in one of the yew trees."

"There you are!" exclaimed Aylesbury. "There isn't the ghost of a doubt."

Wessex looked at Harley in undisguised perplexity.

"I must say, Mr. Harley," he admitted, "that I have never met with a clearer case."

"Neither have I," agreed Harley, cheerfully. "I am going to ask Inspector Aylesbury to return here after nightfall. There is a little experiment which I should like to make, and which would definitely establish my case."

"Your case?" said Aylesbury.

"My case, yes."

"You are not going to tell me that you still persist in believing Camber to be innocent?"

"Not at all. I am merely going to ask you to return at nightfall to assist me in this minor investigation."

"If you ask my opinion," said the Inspector, "no further evidence is needed."

"I don't agree with you," replied Harley, quietly. "Whatever your own ideas upon the subject may be, I, personally, have not yet discovered one single piece of convincing evidence for the prosecution of Camber."

"What!" exclaimed Aylesbury, and even Detective-Inspector Wessex stared at the speaker incredulously.

"My dear Inspector Aylesbury," concluded Harley, "when you have witnessed the experiment which I propose to make this evening you will realize, as I have already realized that we are faced by a tremendous task."

"What tremendous task?"

"The task of discovering who shot Colonel Menendez."