of real terror. I should have been glad to hide myself, if that had been possible, to cower into a corner, or behind a door, or anywhere so that I could not be watched and observed.
"But, overcoming my nervousness with an effort of the will, I got up quickly out of my chair and held the reading lamp aloft so that it shone into all the corners like a searchlight.
"The room was utterly empty! It was utterly empty, at least, to the eye, but to the nerves, and especially to that combination of sense perception which is made up by all the senses acting together, and by no one in particular, there was a person standing there at my very elbow.
"I say 'person,' for I can think of no appropriate word. For, if it was a human being, I can only affirm that I had the overwhelming conviction that it was not, but that it was some form of life wholly unknown to me both as to its essence and its nature. A sensation of gigantic force and power came with it, and I remember vividly to this day my terror on realising that I was close to an invisible being who could crush me as easily as I could crush a fly, and who could see my every movement while itself remaining invisible.
"To this terror was added the certain knowledge
