most resolute expression I have ever seen on a human countenance, and, though for the moment at a fearful disadvantage, he looked like a man who had confidence in himself, and, in spite of the working of fear, was waiting his opportunity.
"For my part, I was face to face with a situation so utterly beyond my knowledge and comprehension, that I felt as helpless as a child, and as useless.
"'Help me back—quick—into that circle,' I heard him half cry, half whisper to me across the moving vapours.
"My only value appears to have been that I was not afraid to act. Knowing nothing of the forces I was dealing with I had no idea of the deadly perils risked, and I sprang forward and caught him by the arms. He threw all his weight in my direction, and by our combined efforts his body left the wall and lurched across the floor towards the circle.
"Instantly there descended upon us, out of the empty air of that smoke-laden room, a force which I can only compare to the pushing, driving power of a great wind pent up within a narrow space. It was almost explosive in its effect, and it seemed to operate upon all parts of my body equally. It
