In 1952, E.B. White's editor Ursula Nordstrom asked him why he wrote Charlotte's Web. The book hadn't yet been released, and White's letter explaining his motivation is utterly charming. Here's a small part:
One cold October evening I was lucky enough to see Aranea Cavatica spin her egg sac and deposit her eggs. (I did not know her name at the time, but I admired her, and later Mr. Willis J. Gertsch of the American Museum of Natural History told me her name.) When I saw that she was fixing to become a mother, I got a stepladder and an extension light and had an excellent view of the whole business. A few days later, when it was time to return to New York, not wishing to part with my spider, I took a razor blade, cut the sac adrift from the underside of the shed roof, put spider and sac in a candy box, and carried them to town. I tossed the box on my dresser. Some weeks later I was surprised and pleased to find that Charlotte's daughters were emerging from the air holes in the cover of the box. They strung tiny lines from my comb to my brush, from my brush to my mirror, and from my mirror to my nail scissors. They were very busy and almost invisible, they were so small. We all lived together happily for a couple of weeks, and then somebody whose duty it was to dust my dresser balked, and I broke up the show.
That story has an ending that will be familiar to those who read the book. Oh, there's more, because White had thoughtful interactions with his pigs as well. Read the rest at Letters of Note. Link -via Metafilter