until at length the room was reduced to silence and perfect order again.
"Judging by the immense relief which also communicated itself to my nerves I then felt that the crisis was over and Smith was wholly master of the situation.
"But hardly had I begun to congratulate myself upon this result, and to gather my scattered senses about me, when, uttering a loud cry, I saw him leap out of the circle and fling himself into the air—as it seemed to me, into the empty air. Then, even while holding my breath for dread of the crash he was bound to come upon the floor, I saw him strike with a dull thud against a solid body in mid-air, and the next instant he was wrestling with some ponderous thing that was absolutely invisible to me, and the room shook with the struggle.
"To and fro they swayed, sometimes lurching in one direction, sometimes in another, and always in horrible proximity to myself, as I leaned trembling against the wall and watched the encounter.
"It lasted at most but a short minute or two, ending as suddenly as it had begun. Smith, with an unexpected movement, threw up his arms with a cry of relief. At the same instant there was a
