The Dillons created a round-robin family biography for the August 1977 issue of The Horn Book, with Leo and Diane Dillon writing about each other and Lee Dillon, then 12 years old, writing about his parents.
From Diane Dillion by Leo Dillon:
Once, after we were married, we were working on a piece and she mentioned very casually that we should do the color in pink and orange. “If we do it in pink and orange,” I said, “that will be the end! I can’t live with someone who’d do anything in pink and orange. We’ll have to get a divorce!” We did it in pink and orange, of course, and a couple of years later everywhere I turned I was seeing things in pink and orange. It’s a common combination now.
From Leo Dillon by Diane Dillon:
I do know, though, that our real feeling about aiming for perfection began with Why Mosquitoes Buzz in People’s Ears. Suddenly it seemed that neither of us could tolerate even a tiny flaw, a minute speck on the black night sky, and we strove for artistic perfection on that book more than on any other except Ashanti to Zulu (both Dial). In a way, when Mosquitoes won the Caldecott Medal, it was as much a reward for us as an award. We had worked harder to achieve perfection—although, of course, we didn’t achieve it—than we ever had before, and people somehow knew it.
From Leo and Diane Dillon by Lee Dillon:
What I don’t like is that they’re always working. Since they won the Caldecott Medal the first time, things have been lots happier around here, but there’s been a lot more work too, and I don’t like that so much. They’re really nice people, my parents, and I’d like to have more time with them when they’re not working.
[Thanks to Andrew Porter for the story.]