Dear Neil, I just wanted you to know that I am very grateful for all the kind things you said about Diana Wynne Jones. I've been her fan since I was a little girl who spent all of her free time reading. Now I'm almost an adult, studying literature, and I still love and admire her. I cried a lot when she died. I regret so much that I never wrote her how much I loved her. It often makes me sad that she doesn't get the recognition she deserves. Thank you and thank you for your beautiful books, too.
You are so welcome.
It’s worth remembering that your favourite writers are often a) still alive and b) would love to hear from you. Which isn’t for them, a lot of the time. It’s for you. If they aren’t around on the web, remember that publishers pretty much always pass on mail for authors (although they take their own sweet time about it) and the publishers’ addresses are usually on the copyright page of the book (and you can verify them with the web to see if they publisher has moved).
This is especially true where your favourite writer isn’t J. K. Rowling or Stephen King or someone who probably has a hard time dealing with their in-box.
(I wonder if Margaret Storey is still alive? If she is, I should write to her and tell her how much I loved her books when I was a boy.)