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 happened before in human history. The world is still studded with the ruins of broken-down civilisations. Barbaric bands made their fastness upon the Acropolis, and the tomb of Hadrian became a fortress that warred across the ruins of Rome against the Colosseum Had all that possibility of reaction ended so certainly in 1940? Is it all so very far away even now?"

"It seems far enough away now," said Edith Haydon.

"But forty years ago?"

"No," said Karenin with his eyes upon the mountains, "I think you underrate the available intelligence in those early decades of the twentieth century. Officially, I know, politically, that intelligence didn't tell—but it was there. And I question your hypothesis. I doubt if that discovery could have been delayed. There is a kind of inevitable logic now in the progress of research. For a hundred years and more thought and science have been going their own way regardless of the common events of life. You see—they have got loose. If there had been no Holsten there would have been some similar man. If atomic energy had not come in one year it would have come in another. In decadent Rome the march of science had scarcely begun Nineveh, Babylon, Athens, Syracuse, Alexandria, these