Doonesbury by Garry Trudeau for January 18, 1973
Man: It's about time you got here, mailman! I'm expecting a letter from my daughter at Wellesley! She's only a freshman, but she's doing mighty well! My Cathy is really something special! Zonker: Cathy? Say, she must be the one who wrote you that she's now living with a saxophone player in Boston! Man: What?! Zonker: Sure, Cathy, that's right!