“Yes, but he is chained on the other side of the house.”

“When do the servants go to bed?”

“About ten.”

“I understand that William was usually in bed also at that hour?”

“Yes.”

“It is singular that on this particular night he should have been up. Now, I should be very glad if you would have the kindness to show us over the house, Mr. Cunningham.”

A stone-flagged passage, with the kitchens branching away from it, led by a wooden staircase directly to the first floor of the house. It came out upon the landing opposite to a second more ornamental stair which came up from the front hall. Out of this landing opened the drawing-room and several bedrooms, including those of Mr. Cunningham and his son. Holmes walked slowly, taking keen note of the architecture of the house. I could tell from his expression that he was on a hot scent, and yet I could not in the least imagine in what direction his inferences were leading him.

“My good sir,” said Mr. Cunningham, with some impatience, “this is surely very unnecessary. That is my room at the end of the stairs, and my son’s is the one beyond it. I leave it to your judgment whether it was possible for the thief to have come up here without disturbing us.”

“You must try round and get on a fresh scent, I fancy,” said the son with a rather malicious smile.

“Still, I must ask you to humour me a little further. I should like, for example, to see how far the windows of the bedrooms command the front. This, I understand, is your son’s room” - he pushed open the door - “and that, I presume is the dressing-room in which he sat smoking when the alarm was given. Where does the window of that look out to?” He stepped across the bedroom, pushed open the door, and glanced round the other chamber.

“I hope that you are satisfied now?” said Mr. Cunningham tartly.

“Thank you, I think I have seen all that I wished.”

“Then if it is really necessary we can go into my room.”

“If it is not too much trouble.”

The J. P. shrugged his shoulders and led the way into his own chamber, which was a plainly furnished and commonplace room. As we moved across it in the direction of the window, Holmes fell back until he and I were the last of the group. Near the foot of the bed stood a dish of oranges and a carafe of water. As we passed it Holmes, to my unutterable astonishment, leaned over in front of me and deliberately knocked the whole thing over. The glass smashed into a thousand pieces and the fruit rolled about into every corner of the room.

“You’ve done it now, Watson,” said he coolly. “A pretty mess you’ve made of the carpet.”

I stooped in some confusion and began to pick up the fruit, understanding for some reason my companion desired me to take the blame upon myself. The others did the same and set the table on its legs again.

“Hullo!” cried the inspector, “where’s he got to?”

Holmes had disappeared.

“Wait here an instant,” said young Alec Cunningham. “The fellow is off his head, in my opinion. Come with me, father, and see where he has got to!”

They rushed out of the room, leaving the inspector, the colonel, and me staring at each other.

“ ‘Pon my word, I am inclined to agree with Master Alec,” said the official. “It may be the effect of this illness, but it seems to me that- -”