luminous points, with a sudden jerk, descended nearer the floor, keeping still their relative distance and horizontal position, and then, as suddenly, they rose to the level of the seat on which I was sitting, and I saw them no more.
"My curiosity was now really excited, and, before I had time to think, I saw again these two dull lamps, again together near the floor; again they disappeared, and again in their old corner I saw them.
"So, keeping my eyes upon them, I edged quietly up my own side, towards the end at which I still saw these tiny discs of red.
"There was very little light in the 'bus. It was nearly dark. I leaned forward to aid my endeavour to discover what these little circles really were. They shifted their position a little as I did so. I began now to perceive an outline of something black,
