"A carriage heavily loaded with luggage has passed out during the last hour."
The inspector laughed. "I saw the wheel-tracks in the light of the gate-lamp, but where does the luggage come in?"
"You may have observed the same wheel-tracks going the other way. But the outward-bound ones were very much deeper--so much so that we can say for a certainty that there was a very considerable weight on the carriage."
"You get a trifle beyond me there," said the inspector, shrugging his shoulder. "It will not be an easy door to force, but we will try if we cannot make some one hear us."
He hammered loudly at the knocker and pulled at the bell, but without any success. Holmes had slipped away, but he came back in a few minutes.
"I have a window open," said he.
"It is a mercy that you are on the side of the force, and not against it, Mr. Holmes," remarked the inspector, as he noted the clever way in which my friend had forced back the catch. "Well, I think that under the circumstances we may enter without an invitation."
One after the other we made our way into a large apartment, which was evidently that in which Mr. Melas had found himself. The inspector had lit his lantern, and by its light we could see the two doors, the curtain, the lamp, and the suit of Japanese mail as he had described them. On the table lay two glasses, and empty brandy-bottle, and the remains of a meal.
"What is that?" asked Holmes, suddenly.
We all stood still and listened. A low moaning sound was coming from somewhere over our heads. Holmes rushed to the door and out into the hall. The dismal noise came from upstairs. He dashed up, the inspector and I at his heels, while his brother Mycroft followed as quickly as his great bulk would permit.
Three doors faced up upon the second floor, and it was from the central of these that the sinister sounds were issuing,
