sinking sometimes into a dull mumble and rising again into a shrill whine. It was locked, but the key had been left on the outside. Holmes flung open the door and rushed in, but he was out again in an instant, with his hand to his throat.
"It's charcoal," he cried. "Give it time. It will clear."
Peering in, we could see that the only light in the room came from a dull blue flame which flickered from a small brass tripod in the centre. It threw a livid, unnatural circle upon the floor, while in the shadows beyond we saw the vague loom of two figures which crouched against the wall. From the open door there reeked a horrible poisonous exhalation which set us gasping and coughing. Holmes rushed to the top of the stairs to draw in the fresh air, and then, dashing into the room, he threw up the window and hurled the brazen tripod out into the garden.
"We can enter in a minute," he gasped, darting out again. "Where is a candle? I doubt if we could strike a match in that atmosphere. Hold the light at the door and we shall get them out, Mycroft, now!"
With a rush we got to the poisoned men and dragged them out into the well-lit hall. Both of them were blue-lipped and insensible, with swollen, congested faces and protruding eyes. Indeed, so distorted were their features that, save for his black beard and stout figure, we might have failed to recognize in one of them the Greek interpreter who had parted from us only a few hours before at the Diogenes Club. His hands and feet were securely strapped together, and he bore over one eye the marks of a violent blow. The other, who was secured in a similar fashion, was a tall man in the last stage of emaciation, with several strips of sticking-plaster arranged in a grotesque pattern over his face. He had ceased to moan as we laid him down, and a glance showed me that for him at least our aid had come too late. Mr. Melas, however, still lived, and in less than an hour, with the aid of ammonia and brandy I had the satisfaction of seeing him open
