I don't know. I find it kind of sad that, 30 years after CITIZEN KANE, Welles had to team up with the creator of Gerald McBoing-Boing to scrape a few shekels together. He was probably only paid enough to finance a good meal at Ma Maison.
In 1970, Welles narrated the Oscar-winning animated short subject IS IT ALWAYS RIGHT TO BE RIGHT? He was really into narrating cartoons at the time.