“Your last remark,” said Holmes, presently, “as to the possibility of there being an understanding between the burglar and the servant, and this being a note of appointment from one to the other, is an ingenious and not entirely impossible supposition. But this writing opens up⁠—” He sank his head into his hands again and remained for some minutes in the deepest thought. When he raised his face again, I was surprised to see that his cheek was tinged with color, and his eyes as bright as before his illness. He sprang to his feet with all his old energy.

“I’ll tell you what,” said he, “I should like to have a quiet little glance into the details of this case. There is something in it which fascinates me extremely. If you will permit me, Colonel, I will leave my friend Watson and you, and I will step round with the Inspector to test the truth of one or two little fancies of mine. I will be with you again in half an hour.”

An hour and half had elapsed before the Inspector returned alone.