And then! It was done in an instant, and yet I clearly saw it. An arm — a woman’s arm — shot out from among the leaves. At the same instant the Baron uttered a horrible cry — a yell which will always ring in my memory. He clapped his two hands to his face and rushed round the room, beating his head horribly against the walls. Then he fell upon the carpet, rolling and writhing, while scream after scream resounded through the house.

“Water! For God’s sake, water!” was his cry.

I seized a carafe from a side-table and rushed to his aid. At the same moment the butler and several footmen ran in from the hall. I remember that one of them fainted as I knelt by the injured man and turned that awful face to the light of the lamp. The vitriol was eating into it everywhere and dripping from the ears and the chin. One eye was already white and glazed. The other was red and inflamed. The features which I had admired a few minutes before were now like some beautiful painting over which the artist has passed a wet and foul sponge. They were blurred, discoloured, inhuman, terrible.

In a few words I explained exactly what had occurred, so far as the vitriol attack was concerned. Some had climbed through through the window and others had rushed out on to the lawn, but it was dark and it had begun to rain. Between his screams the victim raged and raved against the avenger. “It was that hell-cat, Kitty Winter!” he cried. “Oh, the she-devil! She shall pay for it! She shall pay! Oh, God in heaven, this pain is more than I can bear!”

I bathed his face in oil, put cotton wadding on the raw surfaces, and administered a hypodermic of morphia. All suspicion of me had passed from his mind in the presence of this shock, and he clung to my hands as if I might have the power even yet to clear those dead-fish eyes which glazed up at me. I could have wept over the ruin had I not remembered very clearly the vile life which had led up to so hideous a change. It was loathsome to feel the pawing of his burning hands, and I was relieved when his family surgeon, closely followed by a specialist, came to relieve me of my charge. An inspector of police had also arrived, and to him I handed my real card. It would have been useless as well as foolish to do otherwise, for I was nearly as well known by sight at the Yard as Holmes himself. Then I left that house of gloom and terror. Within an hour I was at Baker Street.

Holmes was seated in his familiar chair, looking very pale and exhausted. Apart from his injuries, even his iron nerves had been shocked by the events of the evening, and he listened with horror to my account of the Baron’s transformation.

“The wages of sin, Watson — the wages of sin!” said he. “Sooner or later it will always come. God knows, there was sin enough,” he added, taking up a brown volume from the table. “Here is the book the woman talked of. If this will not break off the marriage, nothing ever could. But it will, Watson. It must. No self-respecting woman could stand it.”

"Exactly!" he said, catching sight of an object made of polished metal. "Exactly! That's it!... Well, upon my word, it took me long enough!"

On the spot on the floor which he had uncovered lay the receiver of a telephone, the cord of which ran up to the apparatus fixed on the wall, at the usual height.

Lupin put the receiver to his ear. The noise began again at once, but it was a mixed noise, made up of different calls, exclamations, confused cries, the noise produced by a number of persons questioning one another at the same time.

"Are you there?... He won't answer. It's awful... They must have killed him. What is it?... Keep up your courage. There's help on the way... police... sol diers... "

"Dash it!" said Lupin, dropping the receiver.

The truth appeared to him in a terrifying vision. Quite at the beginning, while the things upstairs were being moved, Leonard, whose bonds were not securely fastened, had contrived to scramble to his feet, to unhook the receiver, probably with his teeth, to drop it and to appeal for assistance to the Enghien telephone-exchange.

And those were the words which Lupin had overheard, after the first boat started:

"Help!... Murder!... I shall be killed!"

And this was the reply of the exchange. The police were hurrying to the spot. And Lupin remembered the sounds which he had heard from the garden, four or five minutes earlier, at most:

"The police! Take to your heels!" he shouted, darting across the dining room.

"What about Vaucheray?" asked Gilbert.

"Sorry, can't be helped!"

But Vaucheray, waking from his torpor, entreated him as he passed:

"Governor, you wouldn't leave me like this!"

Lupin stopped, in spite of the danger, and was lifting the wounded man, with Gilbert's assistance, when a loud din arose outside:

"Too late!" he said.

At that moment, blows shook the hall-door at the back of the house. He ran to the front steps: a number of men had already turned the corner of the house at a rush. He might have managed to keep ahead of them, with Gilbert, and reach the waterside. But what chance was there of embarking and escaping under the enemy's fire?

He locked and bolted the door.

"We are surrounded... and done for," spluttered Gilbert.

"Hold your tongue," said Lupin.

"But they've seen us, governor. There, they're knocking."

"Hold your tongue," Lupin repeated. "Not a word. Not a movement."

He himself remained unperturbed, with an utterly calm face and the pensive attitude of one who has all the time that he needs to examine a delicate situation from every point of view. He had reached one of those minutes which he called the "superior moments of existence," those which alone give a value and a price to life. On such occasions, however threatening the danger, he always began by counting to himself, slowly - "One... Two... Three... Four.... Five... Six" - until the beating of his heart became normal and regular. Then and not till then, he reflected, but with what intensity, with what perspicacity, with what a profound intuition of possibilities! All the factors of the problem were present in his mind. He foresaw everything. He admitted everything. And he took his resolution in all logic and in all certainty.