There was an electric lamp on the table beside me, but by way of a reserve light I stuffed a box of matches beneath my pillow. My trusty poker I placed down the side of the bed under the top blanket, ready to my hand should I be unseasonably disturbed.

One last look round satisfied me that my preparations were distinctly efficient. As I flicked off the light and lay back on my pillow, I felt a kind of half-hope that there might really be something genuine in the warning I had received. It seemed a pity to have taken so much trouble for nothing.

Going to sleep is always a more or less instantaneous business with me, and, as far as I know, this night was no exception to the rule. At all events, I have no recollection of anything between the time I was fingering the handle of my poker in a kind of dreamy satisfaction and the moment when I started up suddenly in bed with the faint chink of fire-irons still sounding in my ears.

I woke with all my faculties keenly on the alert. Everything round me was in utter darkness, and my hand went out instinctively and closed upon the electric switch. I must have stayed like that for several seconds. My heart was beating rapidly, but I don't think I felt the least afraid.

Then I heard the door close very gently, and someone take a step forward into the room. Without making a sound, I reached under the clothes with my disengaged hand and stealthily withdrew my trusty poker. Having secured this, I wriggled over into such a position that I should be facing the intruder, and then, without further hesitation, I pressed down the switch.

My intention was either to hurl the poker directly the light went up, or else to take a flying jump from the bed and land my visitor a good swipe over the head before he could defend himself. It all depended upon whether he was carrying a revolver.

Unfortunately, neither of these excellent designs materialised. The switch went down with a sharp snap, but instead of a blaze of light flooding the room, everything remained in darkness.

I can tell you I didn't stop to wonder what had happened. The danger of my position struck me with a bang, and in less time than it takes to say I had hurled myself sideways off the bed in the opposite direction from the door.

I was only just in time.

Almost before I reached the floor I heard the crash of an overturning table, and then something came down on the pillow with a wicked thud that made the whole bedstead tremble.