“What about the Hall lake and the chance of a pike?” said Holmes.

The face of the innkeeper clouded.

“That wouldn’t do, sir. You might chance to find yourself in the lake before you were through.”

“How’s that, then?”

“It’s Sir Robert, sir. He‘s terrible jealous of touts. If you two strangers were as near his training quarters as that he’d be after you as sure as fate. He ain’t taking no chances, Sir Robert ain’t.”

“I’ve heard he has a horse entered for the Derby.”

“Yes, and a good colt, too. He carries all our money for the race, and all Sir Robert’s into the bargain. By the way” — he looked at us with thoughtful eyes — “I suppose you ain’t on the turf yourselves?”

“No, indeed. Just two weary Londoners who badly need some good Berkshire air.”

“Well, you are in the right place for that. There is a deal of it lying about. But mind what I have told you about Sir Robert. He’s the sort that strikes first and speaks afterwards. Keep clear of the park.”

“Surely, Mr. Barnes! We certainly shall. By the way, that was a most beautiful spaniel that was whining in the hall.”

“I should say it was. That was the real Shoscombe breed. There ain’t a better in England.”

“I am a dog-fancier myself,” said Holmes. “Now, if it is is a fair question, what would a prize dog like that cost?”

“More than I could pay, sir. It was Sir Robert himself who gave me this one. That’s why I have to keep it on a lead. It would be off to the Hall in a jiffy if I gave it its head.”

“We are getting some cards in our hand, Watson,” said Holmes when the landlord had left us. “It’s not an easy one to play, but we may see our way in a day or two. By the way, Sir Robert is still in London, I hear. We might, perhaps, enter the sacred domain to-night without fear of bodily assault. There are one or two points on which I should like reassurance.”

“Have you any theory, Holmes?”

“Only this, Watson, that something happened a week or so ago which has cut deep into the life of the Shoscombe household. What is that something? We can only guess at it from its effects. They seem to be of a curiously mixed character. But that should surely help us. It is only the colourless, uneventful case which is hopeless.

“Let us consider our data. The brother no longer visits the beloved invalid sister. He gives away her favourite dog. Her dog, Watson! Does that suggest nothing to you?”

“Nothing but the brother’s spite.”

“Well, it might be so. Or — well, there is an alternative. Now to continue our review of the situation from the time that the quarrel, if there is a quarrel, began. The lady keeps her room, alters her habits, is not seen save when she drives out with her maid, refuses to stop at the stables to greet her favourite horse and apparently takes to drink. That covers the case, does it not?”

"The house in the Square Lamartine is occupied by Prasville's men."

"Don't worry, Sebastiani. I shall get in. If they don't open the door, there's always the window. And, if the window won't open, I shall arrange with one of Prasville's men. It's a question of money, that's all. And, thank goodness, I shan't be short of that, henceforth! Good-night, Daubrecq."

He went out, accompanied by Sebastiani, and the heavy door closed after them.

Lupin at once effected his retreat, in accordance with a plan which he had worked out during this scene.

The plan was sunple enough: to scramble, by means of his rope, to the bottom of the cliff, take his friends with him, jump into the motor-car and attack d'Albufex and Sebastiani on the deserted road that leads to Aumale Station. There could be no doubt about the issue of the contest. With d'Albufex and Sebastiani prisoners; it would be an easy matter to make one of them speak. D'Albufex had shown him how to set about it; and Clarisse Mergy would be inflexible where it was a question of saving her son.

He took the rope with which he had provided himself and groped about to find a jagged piece of rock round which to pass it, so as to leave two equal lengths hanging, by which he could let himself down. But, when he found what he wanted, instead of acting swiftly - for the business was urgent - he stood motionless, thinking. His scheme failed to satisfy him at the last moment.

"It's absurd, what I'm proposing," he said to himself. "Absurd and illogical. How can I tell that d'Albufex and Sebastiani will not escape me? How can I even tell that, once they are in my power, they will speak? No, I shall stay. There are better things to try... much better things. It's not those two I must be at, but Daubrecq. He's done for; he has not a kick left in him. If he has told the marquis his secret, there is no reason why he shouldn't tell it to Clarisse and me, when we employ the same methods. That's settled! We'll kidnap the Daubrecq bird." And he continued, "Besides, what do I risk? If the scheme miscarries, Clarisse and I will rush off to Paris and, together with Prasville, organize a careful watch in the Square Lamartine to prevent d'Albufex from benefiting by Daubrecq's revelations. The great thing is for Prasville to be warned of the danger. He shall be."

The church-clock in a neighbouring village struck twelve. That gave Lupin six or seven hours to put his new plan into execution. He set to work forthwith.

When moving away from the embrasure which had the window at the bottom of it, he had come upon a clump of small shrubs in one of the hollows of the cliff. He cut away a dozen of these, with his knife, and whittled them all down to the same size. Then he cut off two equal lengths from his rope. These were the uprights of the ladder. He fastened the twelve little sticks between the uprights and thus contrived a rope-ladder about six yards long.

When he returned to this post, there was only one of the three sons beside Daubrecq's bed in the torture-chamber. He was smoking his pipe by the lamp. Daubrecq was asleep.