“What of this ‘Cooee!’ then?”

“Well, obviously it could not have been meant for the son. The son, as far as he knew, was in Bristol. It was mere chance that he was within earshot. The ‘Cooee!’ was meant to attract the attention of whoever it was that he had the appointment with. But ‘Cooee’ is a distinctly Australian cry, and one which is used between Australians. There is a strong presumption that the person whom McCarthy expected to meet him at Boscombe Pool was someone who had been in Australia.”

“What of the rat, then?”

Sherlock Holmes took a folded paper from his pocket and flattened it out on the table. “This is a map of the Colony of Victoria,” he said. “I wired to Bristol for it last night.” He put his hand over part of the map. “What do you read?”

“ARAT,” I read.

“And now?” He raised his hand.

“BALLARAT. “

“Quite so. That was the word the man uttered, and of which his son only caught the last two syllables. He was trying to utter the name of his murderer. So and so, of Ballarat.”

“It is wonderful!” I exclaimed.

“It is obvious. And now, you see, I had narrowed the field down considerably. The possession of a gray garment was a third point which, granting granting the son’s statement to be correct, was a certainty. We have come now out of mere vagueness to the definite conception of an Australian from Ballarat with a gray cloak.”

“Certainly. “

“And one who was at home in the district, for the pool can only be approached by the farm or by the estate, where strangers could hardly wander.”

“Quite so.”

“Then comes our expedition of to-day. By an examination of the ground I gained the trifling details which I gave to that imbecile Lestrade, as to the personality of the criminal.”

“But how did you gain them?”

“You know my method. It is founded upon the observation of trifles.”

“His height I know that you might roughly judge from the length of his stride. His boots, too, might be told from their traces.”

“Yes, they were peculiar boots.”

“But his lameness?”

“The impression of his right foot was always less distinct than his left. He put less weight upon it. Why? Because he limped — he was lame.”

“But his left-handedness.”

“You were yourself struck by the nature of the injury as recorded by the surgeon at-the inquest. The blow was struck from immediately behind, and yet was upon the left side. Now, how can that be unless it were by a left-handed man? He had stood behind that tree during the interview between the father and son. He had even smoked there. I found the ash of a cigar, which my special knowledge of tobacco ashes enables me to pronounce as an Indian cigar. I have, as you know, devoted some attention to this, and written a little monograph on the ashes of 140 different varieties of pipe, cigar, and cigarette tobacco. Having found the ash, I then looked round and discovered the stump among the moss where he had tossed it. It was an Indian cigar, of the variety which are rolled in Rotterdam.”

So Aaron tied his tie in front of a big Venice mirror, and nothing was a surprise to him. He found a footman hovering to escort him to the dining–room—a real Italian footman, uneasy because milady’s dinner was unsettled. He entered the rather small dining–room, and saw the people at table.

He was told various names: bowed to a young, slim woman with big blue eyes and dark hair like a photograph, then to a smaller rather colourless young woman with a large nose: then to a stout, rubicund, bald colonel, and to a tall, thin, Oxford–looking major with a black patch over his eye—both these men in khaki: finally to a good– looking, well–nourished young man in a dinner–jacket, and he sat down to his soup, on his hostess’ left hand. The colonel sat on her right, and was confidential. Little Sir William, with his hair and his beard white like spun glass, his manner very courteous and animated, the purple facings of his velvet jacket very impressive, sat at the far end of the table jesting with the ladies and showing his teeth in an old man’s smile, a little bit affected, but pleasant, wishing everybody to be happy.

Aaron ate his soup, trying to catch up. Milady’s own confidential Italian butler, fidelity itself, hovered quivering near, spiritually helping the newcomer to catch up. Two nice little entree dishes, specially prepared for Aaron to take the place of the bygone fish and vol au–vents of the proper dinner, testified to the courtesy and charity of his hostess.

Well, eating rapidly, he had more or less caught up by the time the sweets came. So he swallowed a glass of wine and looked round. His hostess with her pearls, and her diamond star in her grey hair, was speaking of Lilly and then of music to him.

“I hear you are a musician. That’s what I should have been if I had had my way.”

“What instrument?” asked Aaron.

“Oh, the piano. Yours is the flute, Mr. Lilly says. I think the flute can be so attractive. But I feel, of course you have more range with the piano. I love the piano—and orchestra.”

At that moment, the colonel and hostess–duties distracted her. But she came back in snatches. She was a woman who reminded him a little of Queen Victoria; so assured in her own room, a large part of her attention always given to the successful issue of her duties, the remainder at the disposal of her guests. It was an old–fashioned, not unpleasant feeling: like retrospect. But she had beautiful, big, smooth emeralds and sapphires on her fingers. Money! What a curious thing it is! Aaron noticed the deference of all the guests at table: a touch of obsequiousness: before the money! And the host and hostess accepted the deference, nay, expected it, as their due. Yet both Sir William and Lady Franks knew that it was only money and success. They had both a certain afterthought, knowing dimly that the game was but a game, and that they were the helpless leaders in the game. They had a certain basic ordinariness which prevented their making any great hits, and which kept them disillusioned all the while. They remembered their poor and insignificant days.