"The point is that the pleasures of spring are available to everybody, and cost nothing. Even in the most sordid street the coming of spring will register itself by some sign or other, if it is only a brighter blue between the chimney pots or the vivid green of an elder sprouting on a blitzed site. Indeed it is remarkable how Nature goes on existing unofficially, as it were, in the very heart of London. I have seen a kestrel flying over the Deptford gasworks, and I have heard a first-rate performance by a blackbird in the Euston Road. There must be some hundreds of thousands, if not millions, of birds living inside the four-mile radius, and it is rather a pleasing thought that none of them pays a halfpenny of rent."
- Fra George Orwells essay Some Thoughts on the Common Toad.