From certain indications with which I was familiar, I observed that Coates was out, whereby I concluded that he had set off to meet the mythical "man with a box." Not without apprehension I inserted the key in the lock and opened the door.

As I did so, I beheld a most singular spectacle.

The careful Coates had closed all the windows as usual before quitting the house, so that there was comparatively little draught along the corridor. But as the door swung open I perceived a sort of gray fog-like vapor floating over the carpet about a foot in depth and moving in slightly sinuous spirals upward towards the opened door!

At this phenomenon I stared in speechless astonishment; for whilst it resembled steam or the early morning mist which one sometimes sees upon the grass in hot weather, I was wholly at a loss to account for its presence inside my cottage!

"Good heavens!" cried Gatton, and grasped me by the arm with so strong a grip that I almost cried out. "Look! Look!"

"What the devil is it?" I muttered; and turning, I stared into his face. "What can it be?"

"Stand back," he said strangely, and pulled me out into the porch. "Do you notice a peculiar smell?"

"I do—a most foul and abominable smell."

Gatton nodded grimly.

"God knows what has happened here since you left," he said; "but of one thing I am sure—you must certainly bear a charmed life, Mr. Addison. There has been a third attempt at your removal!"