“Well, it might do - so far as it goes.”

“Exactly! As far as it goes. How would all that bear upon the visits by night to the old crypt? We can’t fit that into our plot.”

“No, sir, and there is something more that I can’t fit in. Why should Sir Robert want to dig up a dead body?”

Holmes sat up abruptly.

“We only found it out yesterday - after I had written to you. Yesterday Sir Robert had gone to London, so Stephens and I went down to the crypt. It was all in order, sir, except that in one corner was a bit of a human body.”

“You informed the police, I suppose?”

Our visitor smiled grimly.

“Well, sir, I think it would hardly interest them. It was just the head and a few bones of a mummy. It may have been a thousand years old. But it wasn’t there before. That I’ll swear, and so will Stephens. It had been stowed away in a corner and covered over with a board, but that corner had always been empty before.”

“What did you do with it?”

“Well, we just left it there.”

“That was wise. You say Sir Robert was away yesterday. Has he returned?”

“We expect him back to-day.”

“When did Sir Robert give away his sister’s dog?”

“It was just a week ago to-day. The creature was howling outside the old well-house, and Sir Robert was in one of his tantrums that morning. He caught it up, and I thought he would have killed it. Then he gave it to Sandy Bain, the jockey, and told him to take the dog to old Barnes at the Green Dragon, for he never wished to see it again.”

Holmes sat for some time in silent thought. He had lit the oldest and foulest of his pipes.

“I am not clear yet what you want me to do in this matter, Mr. Mason,” he said at last. “Can’t you make it more definite?”

“Perhaps this will make it more definite, Mr. Holmes,” said our visitor.

He took a paper from his pocket, and, unwrapping it carefully, he exposed a charred fragment of bone.

Holmes examined it with interest.

“Where did you get it?”

“There is a central heating furnace in the cellar under Lady Beatrice’s room. It’s been off for some time, but Sir Robert complained of cold and had it on again. Harvey runs it - he’s one of my lads. This very morning he came to me with this which he found raking out the cinders. He didn’t like the look of it.”

“Nor do I,” said Holmes. “What do you make of it, Watson?”

It was burned to a black cinder, but there could be no question as to its anatomical significance.

“It’s the upper condyle of a human femur,” said I.

“Exactly!” Holmes had become very serious. “When does this lad tend to the furnace?”

“He makes it up every evening and then leaves it.”

“Then anyone could visit it during the night?”

“Yes, sir.”

“Can you enter it from outside?”

“There is one door from outside. There is another which leads up by a stair to the passage in which Lady Beatrice’s room is situated.”

“These are deep waters, Mr. Mason; deep and rather dirty. You say that Sir Robert was not at home last night?”

“No, sir.”

“Then, whoever was burning bones, it was not he.”

“That’s true, sir.”

“What is the name of that inn you spoke of?”

“The Green Dragon.”

“Is there good fishing in that part of Berkshire?” The honest trainer showed very clearly upon his face that he was convinced that yet another lunatic had come into his harassed life.

“Well, sir, I’ve heard there are trout in the mill-stream and pike in the Hall lake.”