fell upon us with a rushing noise that filled my ears and made me think for a moment the very walls and roof of the building had been torn asunder. Under its first blow we staggered back against the wall, and I understood plainly that its purpose was to prevent us getting back into the circle in the middle of the floor.
"Pouring with perspiration, and breathless, with every muscle strained to the very utmost, we at length managed to get to the edge of the circle, and at this moment, so great was the opposing force, that I felt myself actually torn from Smith's arms, lifted from my feet, and twirled round in the direction of the windows as if the wheel of some great machine had caught my clothes and was tearing me to destruction in its revolution.
"But, even as I fell, bruised and breathless, against the wall, I saw Smith firmly upon his feet in the circle and slowly rising again to an upright position. My eyes never left his figure once in the next few minutes.
"He drew himself up to his full height. His great shoulders squared themselves. His head was thrown back a little, and as I looked I saw the expression on his face change swiftly from fear to
