had time to catch—I was certain I saw a dark grey shadow, of ungainly shape, and with something more or less like a human head, drive rapidly past the side of the wall farthest from me and disappear into the gloom by the angle of the door.
"I waited one single second to be sure the candle was alight, and then dashed after it, but before I had gone two steps, my foot stumbled against something hard piled up on the carpet and I only just saved myself from falling headlong. I picked myself up and found that all the books from what I called my 'language shelf' were strewn across the floor. The room, meanwhile, as a minute's search revealed, was quite empty. I looked in every corner and behind every stick of furniture, and a student's bedroom on a top floor, costing twelve shillings a week, did not hold many available hiding-places, as you may imagine.
"The crash, however, was explained. Some very practical and physical force had thrown the books from their resting-place. That, at least, was beyond all doubt. And as I replaced them on the shelf and noted that not one was missing, I busied myself mentally with the sore problem of how the agent of this little practical joke had gained access
