“I will tell you, then,what occurred in your house last night. Your niece,when you had, as she thought, gone to your room,slipped down and talked to her lover through the window which leads into the stable lane. His footmarks had pressed right through the snow, so long had he stood there. She told him of the coronet. His wicked lust for gold kindled at the news, and he bent her to his will. I have no doubt that she loved you, but there are women in whom the love of a lover extinguishes all other loves, and I think that she must have been one. She had hardly listened to his instructions when she saw you coming downstairs, on which she closed the window rapidly and told you about one of the servants’ escapade with her wooden-legged lover, which was all perfectly true.
“Your boy, Arthur, went to bed after his interview with you but he slept badly on account of his uneasiness about his club debts. In the middle of the night he heard a soft tread pass his door, so he rose and, looking out, was surprised to see his cousin walking very stealthily along the passage until she disappeared into your dressing-room. Petrified with astonishment, the lad slipped on some clothes and waited there in the dark to see what would come of this strange affair. Presently she emerged from the room again, and in the light of the passage-lamp your son saw that she carried the precious coronet in her hands. She passed down the stairs, and he, thrilling with horror, ran along and slipped behind the curtain near your door, whence he could see what passed in the hall beneath. He saw her stealthily open the window, hand out the coronet to someone in the gloom, and then closing it once more hurry back to her room, passing quite close to where he stood hid behind the curtain.
“As long as she was on the scene he could not take any action without a horrible exposure of the woman whom he loved. But the instant that she was gone he realised how crushing a misfortune this would be for you, and how all-important it was to set it right. He rushed down, just as he was, in his bare feet, opened the window, sprang out into the snow, and ran down the lane, where he could see a dark figure in the moonlight. Sir George Burnwell tried to get away, but Arthur caught him, and there was a struggle between them, your lad tugging at one side of the coronet, and his opponent at the other. In the scuffle, your son struck Sir George and cut him over the eye. Then something suddenly snapped, and your son, finding that he had the coronet in his hands, rushed back, closed the window, ascended to your room, and had just observed that the coronet had been twisted in the struggle and was endeavouring to straighten it when you appeared upon the scene.”
“Is it possible?” gasped the banker.
“You then roused his anger by calling him names at a moment when he felt that he had deserved your warmest thanks. He could not explain the true state of affairs without betraying one who certainly deserved little enough consideration at his hands. He took the more chivalrous view, however, and preserved her secret.”
“And that was why she shrieked and fainted when she saw the coronet,” cried Mr. Holder. “Oh, my God!what a blind fool I have been!And his asking to be allowed to go out for five minutes!The dear fellow wanted to see if the missing piece were at the scene of the struggle. How cruelly I have misjudged him!”
“When I arrived at the house,” continued Holmes,“I at once went very carefully round it to observe if there were any traces in the snow which might help me. I knew that none had fallen since the evening before, and also that there had been a strong frost to preserve impressions. I passed along the tradesmen’s path, but found it all trampled down and indistinguishable. Just beyond it, however, at the far side of the kitchen door, a woman had stood and talked with a man, whose round impressions on one side showed that he had a wooden leg. I could even tell that they had been disturbed, for the woman had run back swiftly to the door, as was shown by the deep toe and light heel marks, while Wooden-leg had waited a little, and then had gone away. I thought at the time that this might be the maid and her sweetheart, of whom you had already spoken to me, and inquiry showed it was so. I passed round the garden without seeing anything more than random tracks, which I took to be the police; but when I got into the stable lane a very long and complex story was written in the snow in front of me.
“There was a double line of tracks of a booted man,and a second double line which I saw with delight belonged to a man with naked feet. I was at once convinced from what you had told me that the latter was your son. The first had walked both ways, but the other had run swiftly, and as his tread was marked in places over the depression of the boot, it was obvious that he had passed after the other. I followed them up and found they led to the hall window, where Boots had worn all the snow away while waiting. Then I walked to the other end, which was a hundred yards or more down the lane. I saw where Boots had faced round, where the snow was cut up as though there had been a struggle, and, finally, where a few drops of blood had fallen, to show me that I was not mistaken. Boots had then run down the lane, and another little smudge of blood showed that it was he who had been hurt. When he came to the high road at the other end, I found that the pavement had been cleared, so there was an end to that clue.
“On entering the house, however, I examined,as you remember, the sill and framework of the hall window with my lens,and I could at once see that someone had passed out.I could distinguish the outline of an instep where the wet foot had been placed in coming in. I was then beginning to be able to form an opinion as to what had occurred. A man had waited outside the window; someone had brought the gems; the deed had been overseen by your son; he had pursued the thief; had struggled with him; they had each tugged at the coronet, their united strength causing injuries which neither alone could have effected. He had returned with the prize, but had left a fragment in the grasp of his opponent. So far I was clear. The question now was, who was the man, and who was it brought him the coronet?
“It is an old maxim of mine that when you have excluded the impossible,whatever remains, however improbable,must be the truth. Now,I knew that it was not you who had brought it down,so there only remained your niece and the maids.But if it were the maids,why should your son allow himself to be accused in their place?There could be no possible reason.As he loved his cousin, however,there was an excellent explanation why he should retain her secret—the more so as the secret was a disgraceful one. When I remembered that you had seen her at that window, and how she had fainted on seeing the coronet again, my conjecture became a certainty.