Doonesbury by Garry Trudeau for April 19, 1991
Transcript:
B.D. (reading): "The truth is, B.D., your leaving forced me to become more self-reliant." "Slowly but surely, I've been learning to think more for myself and take charge of my life." Soldier: Maybe it's a gag letter. B.D.: Gotta be. Look! It's typed! Boopsie can't type!