That is the one, he finds the note in a tree. Thank you . I have wondered about that for years! It was a page out of a magazine my grandmother had saved. I read it 30 years ago . I found it in an atlas that predated world war 2.
In Waukegan there is a park named after Ray Bradbury, and it has a plaque commemorating the opening of the park. It says "Ray Bradbury. We remember you. We remember you."