The Victorian comic magazine Fun published a cartoon titled 'I Must Walk My Chalks,' depicting a milkman who had adulterated his milk with chalk. The image and its accompanying joke played on the phrase 'walking my chalks' to highlight the widespread practice of adding chalk to watered-down milk to make it appear richer. This cartoon reflected the public's awareness and dark humor about food adulteration.

The Fun cartoon is a significant cultural artifact that shows how visual and verbal humor were used to critique commercial deception. The prevalence of such jokes in popular periodicals influenced the tone of social commentary in Victorian literature, including the works of Dickens and Thackeray. The cartoon also contributed to a shared vocabulary of food fraud metaphors, which poets and writers could draw upon to critique consumer society.