“When you go to bed lock the door of this room on the outside and keep the key. Promise to do this.”

“But Percy?”

“He will come to London with us.”

“And am I to remain here?”

“It is for his sake. You can serve him. Quick! Promise!”

She gave a quick nod of assent just as the other two came up.

“Why do you sit moping there, Annie?” cried her brother. “Come out into the sunshine!”

“No, thank you, Joseph. I have a slight headache and this room is deliciously cool and soothing.”

“What do you propose now, Mr. Holmes?” asked our client.

“Well, in investigating this minor affair we must not lose sight of our main inquiry. It would be a very great help to me if you would come up to London with us.”

“At once?”

“Well, as soon as you conveniently can. Say in an hour.”

“I feel quite strong enough, if I can really be of any help.”

“The greatest possible.”

“Perhaps you would like me to stay there to-night?”

“I was just going to propose it.”

“Then, if my friend of the night comes to revisit me, he will find the bird flown. We are all in your hands, Mr. Holmes, and you must tell us exactly what you would like done. Perhaps you would prefer that Joseph came with us so as to look after me?”

“Oh, no, my friend Watson is a medical man, you know, and he’ll look after you. We’ll have our lunch here, if you will permit us, and then we shall all three set off for town together.”

It was arranged as he suggested, though Miss Harrison excused herself from leaving the bedroom, in accordance with Holmes’s suggestion. What the object of my friend’s manoeuvres was I could not conceive, unless it were to keep the lady away from Phelps, who, rejoiced by his returning health and by the prospect of action, lunched with us in the dining-room. Holmes had a still more startling surprise for us, however, for, after accompanying us down to the station and seeing us into our carriage, he calmly announced that he had no intention of leaving Woking.

“There are one or two small points which I should desire to clear up before I go,” said he. “Your absence, Mr. Phelps, will in some ways rather assist me. Watson, when you reach London you would oblige me by driving at once to Baker Street with our friend here, and remaining with him until I see you again. It is fortunate that you are old school-fellows, as you must have much to talk over. Mr. Phelps can have the spare bedroom to-night, and I will be with you in time for breakfast, for there is a train which will take me into Waterloo at eight.”

“But how about our investigation in London?” asked Phelps ruefully.

“We can do that to-morrow. I think that just at present I can be of more immediate use here.”

“You might tell them at Briarbrae that I hope to be back to-morrow night,” cried Phelps, as we began to move from the platform.

“I hardly expect to go back to Briarbrae,” answered Holmes, and waved his hand to us cheerily as we shot out from the station.

Phelps and I talked it over on our journey, but neither of us could devise a satisfactory reason for this new development.

“I suppose he wants to find out some clues as to the burglary last night, if a burglar it was. For myself, I don’t believe it was an ordinary thief.”

“What is your own idea, then?”