Someone forwarded me a year-old short story by Neil Gaiman the Guardian published last spring. It begins:
The Thames is a filthy beast: it winds through London like a snake, or a sea serpent. All the rivers flow into it, the Fleet and the Tyburn and the Neckinger, carrying all the filth and scum and waste, the bodies of cats and dogs and the bones of sheep and pigs down into the brown water of the Thames, which carries them east into the estuary and from there into the North Sea and oblivion.
It is raining in London. The rain washes the dirt into the gutters, and it swells streams into rivers, rivers into powerful things. The rain is a noisy thing, splashing and pattering and rattling the rooftops. If it is clean water as it falls from the skies it only needs to touch London to become dirt, to stir dust and make it mud.
Read the rest here.