“This may be very interesting,” said Lestrade, in the injured tone of one who suspects that he is being laughed at; “I cannot see, however, what it has to do with the death of Mr. Joseph Stangerson.”

“Patience, my friend, patience! You will find in time that it has everything to do with it. I shall now add a little milk to make the mixture palatable, and on presenting it to the dog we find that he laps it up readily enough.”

As he spoke he turned the contents of the wineglass into a saucer and placed it in front of the terrier, who speedily licked it dry. Sherlock Holmes’s earnest demeanour had so far convinced us that we all sat in silence, watching the animal intently, and expecting some startling effect. None such appeared, however. The dog continued to lie stretched upon the cushion, breathing in a laboured way, but apparently neither the better nor the worse for its draught.

Holmes had taken out his watch, and as minute followed minute without result, an expression of the utmost chagrin and disappointment appeared upon his features. He gnawed his lip, drummed his fingers upon the table, and showed every other symptom of acute impatience. So great was his emotion that I felt sincerely sorry for him, while the two detectives smiled derisively, by no means displeased at this check which he had met.

“It can’t be a coincidence,” he cried, at last springing from his chair and pacing wildly up and down the room; “it is impossible impossible that it should be, a mere coincidence. The very pills which I suspected in the case of Drebber are actually found after the death of Stangerson. And yet they are inert. What can it mean? Surely my whole chain of reasoning cannot have been false. It is impossible! And yet this wretched dog is none the worse. Ah, I have it! I have it!” With a perfect shriek of delight he rushed to the box, cut the other pill in two, dissolved it, added milk, and presented it to the terrier. The unfortunate creature’s tongue seemed hardly to have been moistened in it before it gave a convulsive shiver in every limb, and lay as rigid and lifeless as if it had been struck by lightning.

Sherlock Holmes drew a long breath, and wiped the perspiration from his forehead. “I should have more faith,” he said; “I ought to know by this time that when a fact appears to be opposed to a long train of deductions, it invariably proves to be capable of bearing some other interpretation. Of the two pills in that box, one was of the most deadly poison, and the other was entirely harmless. I ought to have known that before ever I saw the box at all.”

This last statement appeared to me to be so startling that I could hardly believe that he was in his sober senses. There was the dead dog, however, to prove that his conjecture had been correct. It seemed to me that the mists in my own mind were gradually clearing away, and I began to have a dim, vague perception of the truth.

“All this seems strange to you,” continued Holmes, “because you failed at the beginning of the inquiry to grasp the importance of the single real clue which was presented to you. I had the good fortune to seize upon that, and everything which has occurred since then has served to confirm my original supposition, and, indeed, was the logical sequence of it. Hence things which have perplexed you and made the case more obscure have served to enlighten me and to strengthen my conclusions. It is a mistake to confound strangeness with mystery. The most commonplace crime is often the most mysterious, because it presents no new or special features from which deductions may be drawn. This murder would have been infinitely more difficult to unravel had the body of the victim been simply found lying in the roadway without any of those outre and sensational accompaniments which have rendered it remarkable. These strange details, far from making the case more difficult, have really had the effect of making it less so.”

Punctually at eleven o’clock, the carriages began to arrive. There was a stir in the crowd at the gate, a concentration as a carriage drove up, wedding guests were mounting up the steps and passing along the red carpet to the church. They were all gay and excited because the sun was shining.

Gudrun watched them closely, with objective curiosity. She saw each one as a complete figure, like a character in a book, or a subject in a picture, or a marionette in a theatre, a finished creation. She loved to recognise their various characteristics, to place them in their true light, give them their own surroundings, settle them for ever as they passed before her along the path to the church. She knew them, they were finished, sealed and stamped and finished with, for her. There was none that had anything unknown, unresolved, until the Criches themselves began to appear. Then her interest was piqued. Here was something not quite so preconcluded.

There came the mother, Mrs Crich, with her eldest son Gerald. She was a queer unkempt figure, in spite of the attempts that had obviously been made to bring her into line for the day. Her face was pale, yellowish, with a clear, transparent skin, she leaned forward rather, her features were strongly marked, handsome, with a tense, unseeing, predative look. Her colourless hair was untidy, wisps floating down on to her sac coat of dark blue silk, from under her blue silk hat. She looked like a woman with a monomania, furtive almost, but heavily proud.

Her son was of a fair, sun–tanned type, rather above middle height, well–made, and almost exaggeratedly well–dressed. But about him also was the strange, guarded look, the unconscious glisten, as if he did not belong to the same creation as the people about him. Gudrun lighted on him at once. There was something northern about him that magnetised her. In his clear northern flesh and his fair hair was a glisten like sunshine refracted through crystals of ice. And he looked so new, unbroached, pure as an arctic thing. Perhaps he was thirty years old, perhaps more. His gleaming beauty, maleness, like a young, good–humoured, smiling wolf, did not blind her to the significant, sinister stillness in his bearing, the lurking danger of his unsubdued temper. ‘His totem is the wolf,’ she repeated to herself. ‘His mother is an old, unbroken wolf.’ And then she experienced a keen paroxyism, a transport, as if she had made some incredible discovery, known to nobody else on earth. A strange transport took possession of her, all her veins were in a paroxysm of violent sensation. ‘Good God!’ she exclaimed to herself, ‘what is this?’ And then, a moment after, she was saying assuredly, ‘I shall know more of that man.’ She was tortured with desire to see him again, a nostalgia, a necessity to see him again, to make sure it was not all a mistake, that she was not deluding herself, that she really felt this strange and overwhelming sensation on his account, this knowledge of him in her essence, this powerful apprehension of him. ‘Am I REALLY singled out for him in some way, is there really some pale gold, arctic light that envelopes only us two?’ she asked herself. And she could not believe it, she remained in a muse, scarcely conscious of what was going on around.