'As I stood there in the gathering dark I thought that in this simple explanation I had mastered the problem of the world—mastered the whole secret of these delicious people. Possibly the checks they had devised for the increase of population had succeeded too well, and their numbers had rather diminished than kept stationary. That would account for the abandoned ruins. Very simple was my explanation, and plausible enough—as most wrong theories are!

'As I stood there musing over this too perfect triumph of man, the full moon, yellow and gibbous, came up out of an overflow of silver light in the north-east. The bright little figures ceased to move about below, a noiseless owl flitted by, and I shivered with the chill of the night. I determined to descend and find where I could sleep.

'I looked for the building I knew. Then my eye travelled along to the figure of the White Sphinx upon the pedestal of bronze, growing distinct as the light of the rising moon grew brighter. I could see the silver birch against it. There was the tangle of rhododendron bushes, black in the pale light, and there was the little lawn. I looked at the lawn again. A queer doubt chilled my complacency. "No," said I stoutly to myself, "that was not the lawn."