Of all the centres of attraction, London formed the greatest magnet to draw to itself these floating and isolated particles of humanity. Like fragments of flotsam in a whirlpool, they were attracted into its confines; and once within that labyrinth, they emerged no more. Lost in its unfamiliar mazes, they wandered here and there, unable to escape even if they had wished to do so; and no Ariadne waited on them with her clue. Perhaps I overrate the strangeness of the spectacle and lay more stress upon it than it deserves. It may be that in the depths of the country even weirder things were done. But London I saw with my own eyes in the last stages of its career; and I cannot shake myself free from the impression made upon me by that uncanny shadow-show beneath the moon. * * * * * Gradually but surely the tide of human existence ebbed in Britain outside the Nitrogen Area. Here and there in the central districts there might be isolated patches whereon some living creatures remained by accident with food sufficient to prolong their vitality for a little longer; but after a few months even these were obliterated and the last survivors of the race of men were to be found clinging to the coasts of the island where food was still to be procured from the sea. Some of them struggled through the Famine period under these conditions; but most of them perished eventually from starvation; for even in the marine areas conditions were changing and the old abundant harvest of sea-creatures had passed away. The herring and other edible fish were driven to new feeding-grounds. The supply brought in by the fishing-boats diminished steadily, until at last men ceased to go out upon the waters and gave up the struggle. The winter was an exceptionally bitter one--possibly the change in the surface conditions produced by _B. diazotans_ affected the world-climate, though that is still a moot point--and the cold completed the work. Long before the spring came, Britain was a mere Raft of the _Medusa_ lying upon the waters and peopled by a handful of survivors out of what had once been a mighty company. CHAPTER XI Fata Morgana To explain how I came to witness the spectacle of London in its extremity, I must go back to the evening at Nordenholt’s which I have already described. He persisted in his project of forcing us into the fresh air, often twice or thrice a week if the weather was favourable; and to tell the truth, I was nothing loath. Over a hundred hours of my week were spent in concentrated mental activity under conditions which removed me more and more from direct contact with human affairs as time went on; and I looked forward with pleasure to these brief interludes during which I could take up once more the threads of my old life and its interests.