“Very interesting reading it might be made, too,” remarked Sherlock Holmes, sticking a small piece of plaster over the prick on his finger. “I have to be careful,” he continued, turning to me with a smile, “for I dabble with poisons a good deal.” He held out his hand as he spoke, and I noticed that it was all mottled over with similar pieces of plaster, and discoloured with strong acids.

“We came here on business,” said Stamford, sitting down on a high three-legged stool, and pushing another one in my direction with his foot. “My friend here wants to take diggings; and as you were complaining that you could get no one to go halves with you, I thought that I had better bring you together.”

Sherlock Holmes seemed delighted at the idea of sharing his rooms with me. “I have my eye on a suite in Baker Street,” he said, “which would suit us down to the ground. You don’t mind the smell of strong tobacco, I hope?”

“I always smoke ‘ship’s’ myself,” I answered.

“That’s good enough. I generally have chemicals about, and occasionally do experiments. Would that that annoy you?”

“By no means.”

“Let me see — what are my other shortcomings? I get in the dumps at times, and don’t open my mouth for days on end. You must not think I am sulky when I do that. Just let me alone, and I’ll soon be right. What have you to confess now? It’s just as well for two fellows to know the worst of one another before they begin to live together.”

I laughed at this cross-examination. “I keep a bull pup,” I said, “and I object to rows because my nerves are shaken, and I get up at all sorts of ungodly hours, and I am extremely lazy. I have another set of vices when I’m well, but those are the principal ones at present.”

“Do you include violin playing in your category of rows?” he asked, anxiously.

“It depends on the player,” I answered. “A well-played violin is a treat for the gods — a badly played one —”

“Oh, that’s all right,” he cried, with a merry laugh. “I think we may consider the thing as settled — that is if the rooms are agreeable to you.”

“When shall we see them?”

“Call for me here at noon to-morrow, and we’ll go together and settle everything,” he answered.

“All right — noon exactly,” said I, shaking his hand.

We left him working among his chemicals, and we walked together towards my hotel.

“By the way,” I asked suddenly, stopping and turning upon Stamford, “how the deuce did he know that I had come from Afghanistan?”

My companion smiled an enigmatical smile. “That’s just his little peculiarity,” he said. “A good many people have wanted to know how he finds things out.”

“Oh! a mystery is it?” I cried, rubbing my hands. “This is very piquant. I am much obliged to you for bringing us together. ‘The proper study of mankind is man,’ you know.”

‘You’re quite sure it’s all right for you?’

‘Perfectly all right.’

And again they were still. The launch twanged and hooted, somebody was singing. Then as if the night smashed, suddenly there was a great shout, a confusion of shouting, warring on the water, then the horrid noise of paddles reversed and churned violently.

Gerald sat up, and Gudrun looked at him in fear.

‘Somebody in the water,’ he said, angrily, and desperately, looking keenly across the dusk. ‘Can you row up?’

‘Where, to the launch?’ asked Gudrun, in nervous panic.

‘Yes.’

‘You’ll tell me if I don’t steer straight,’ she said, in nervous apprehension.

‘You keep pretty level,’ he said, and the canoe hastened forward.

The shouting and the noise continued, sounding horrid through the dusk, over the surface of the water.

‘Wasn’t this BOUND to happen?’ said Gudrun, with heavy hateful irony. But he hardly heard, and she glanced over her shoulder to see her way. The half–dark waters were sprinkled with lovely bubbles of swaying lights, the launch did not look far off. She was rocking her lights in the early night. Gudrun rowed as hard as she could. But now that it was a serious matter, she seemed uncertain and clumsy in her stroke, it was difficult to paddle swiftly. She glanced at his face. He was looking fixedly into the darkness, very keen and alert and single in himself, instrumental. Her heart sank, she seemed to die a death. ‘Of course,’ she said to herself, ‘nobody will be drowned. Of course they won’t. It would be too extravagant and sensational.’ But her heart was cold, because of his sharp impersonal face. It was as if he belonged naturally to dread and catastrophe, as if he were himself again.

Then there came a child’s voice, a girl’s high, piercing shriek:

‘Di—Di—Di—Di—Oh Di—Oh Di—Oh Di!’

The blood ran cold in Gudrun’s veins.

‘It’s Diana, is it,’ muttered Gerald. ‘The young monkey, she’d have to be up to some of her tricks.’

And he glanced again at the paddle, the boat was not going quickly enough for him. It made Gudrun almost helpless at the rowing, this nervous stress. She kept up with all her might. Still the voices were calling and answering.

‘Where, where? There you are—that’s it. Which? No—No–o–o. Damn it all, here, HERE—’ Boats were hurrying from all directions to the scene, coloured lanterns could be seen waving close to the surface of the lake, reflections swaying after them in uneven haste. The steamer hooted again, for some unknown reason. Gudrun’s boat was travelling quickly, the lanterns were swinging behind Gerald.

And then again came the child’s high, screaming voice, with a note of weeping and impatience in it now:

‘Di—Oh Di—Oh Di—Di—!’