Doonesbury by Garry Trudeau for June 22, 1979
Transcript:
Man: Duke, I thought you prided yourself on tight security here. Duke: I do. I'm a private man, Andrews - and cautious! Why do you ask? Man: There's some kid down there by your stream. He's got a guitar... Duke: Oh, no! It can't be! Voice: Rocky Mountain Hiiiiigh!! Man: Hey! Wait a minute! Isn't that... Duke: God, how embarassing! Voice: Far out! Man: Duke! You've got John Denver in your backyard! Duke: I'd like to explain. See, both the Dobermans are at the vet's.