The original letter: https://www.portmann.com/farside/index.html?home.html
And the reversal: https://www.thefarside.com/about/48/a-letter-from-gary-larso...
... for cartoons, my favourite has always been:
[A cow, wearing jewellery and holding a martini glass, stands by the picture window of a well-appointed suburban home, while a bull sits in an armchair, watching TV, with a beer in his hoof]
Cow: "Wendell... I'm not content"