He replaced the muslin covering and took out his pipe and tobacco pouch. Absurd, outrageous ideas crowded to my mind. Was it, then, possible that our dream was to become reality?

"I don't suppose they'll live much longer," I stammered.

He was silent until he had lit his pipe.

"If you met a man who had lived twenty-five thousand years, would you be inclined to tell me he would not live much longer, simply on general considerations?"

I could not find a satisfactory answer.

As a matter of fact the question scarcely conveyed anything to me. One can realize only by reference to familiar standards. The idea of a man who has lived one hundred and fifty years is to me a more realistic curiosity than the idea of a man twenty-five thousand years old. But I caught a glimpse, as it were, of strange figures, moving about in a colourless background, with calm gestures, slow speeches, silences perhaps a year in length. The familiar outline of London crumbled suddenly away, the blotches of shadow and the coloured shafts of light striking between the gaps in the crowds, the violet-lit tubes, the traffic, faded into the conception of twenty-five thousand years. All this many-angled, many-coloured modern spectacle that was a few thousand years removed from cave dwellings, was rolled flat and level, merging into this grey formless carpet of time.

Next morning Sarakoff returned to Russia, bearing with him the wonderful butterflies, and for many months I heard nothing from him. But before he went he told me that he would return soon.

"I have only one step further to take and the ideal germ will be created, Harden. Then we poor mortals will realize the dream that has haunted us since the beginning of time. We will attain immortality, and the fear of death, round which everything is built, will vanish. We will become gods!"

"Or devils, Sarakoff," I murmured.