The sky above was loaded with the clouds of snow, leaving London in a darkness and oppression premature for that hour of the evening. On each side of Syme the walls of the alley were blind and featureless; there was no little window or any kind of eve. He felt a new impulse to break out of this hive of houses, and to get once more into the open and lamp-lit street. Yet he rambled and dodged for a long time before he struck the main thoroughfare. When he did so, he struck it much farther up than he had fancied. He came out into what seemed the vast and void of Ludgate Circus, and saw St. Paul’s Cathedral sitting in the sky.
At first he was startled to find these great roads so empty, as if a pestilence had swept through the city. Then he told himself that some degree of emptiness was natural; first because the snow-storm was even dangerously deep, and secondly because it was Sunday. . . . Under the white fog of snow high up in the heaven the whole atmosphere of the city was turned to a very queer kind of green twilight, as of men under the sea. The sealed and sullen sunset behind the dark dome of St. Paul’s had in it smoky and sinister colours — colours of sickly green, dead red or decaying bronze, that were just bright enough to emphasise the solid whiteness of the snow. But right up against these dreary colours rose the black bulk of the cathedral; and upon the top of the cathedral was a random splash and great stain of snow, still clinging as to an Alpine peak. It had fallen accidentally, but just so fallen as to half drape the dome from its very topmost point, and to pick out in perfect silver the great orb and the cross. When Syme saw it he suddenly straightened himself, and made with his sword-stick an involuntary salute.
He knew that that evil figure, his shadow, was creeping quickly or slowly behind him, and he did not care.
It seemed a symbol of human faith and valour that while the skies were darkening that high place of the earth was bright. The devils might have captured heaven, but they had not yet captured the cross.
G. K. Chesterton, The Man Who Was Thursday: A Nightmare ch. vii (1908).