This New York Times article covers some of the cleaning methods used in Victorian England, including using bread to clean wallpaper. Stone floors were also cleaned with skim milk, and laundry with fresh urine (cringing here!). It is interesting to note that the advent of the practice of using bread as a sponge on dirty wallpaper came after the shift from wood stove use to coal heat. It makes sense that the walls would become covered in soot that could easily be removed with bread. I can easily pick items out on my workbench that were stored in environments heated with coal. They are covered in an oily soot that resembles a thick grey coating of dust. Anyway, this is an informative and entertaining article, well worth the read!