closed or left open. With one finger on each paper, he traced out the course that must be followed from the entrance. There were one or two slight mistakes, but here, near the centre, was a bad confusion, probably due to the entry of the second or third bat. Before correcting the copy he followed out carefully the last turnings of the path on the original. These, at least, were right; they led without a hitch to the middle space. Here was a feature which need not be repeated on the copy—an ugly black spot about the size of a shilling. Ink? No. It resembled a hole, but how should a hole be there? He stared at it with tired eyes: the work of tracing had been very laborious, and he was drowsy and oppressed. . . . But surely this was a very odd hole. It seemed to go not only through the paper, but through the table on which it lay. Yes, and through the floor below that, down, and still down, even into infinite depths. He craned over it, utterly bewildered. Just as, when you were a child, you may have pored over a square inch of counterpane until it
