Selling odd rolls of wallpaper on the street? Well, why not? Surplus manufactured goods always wind up somewhere. Still, this abject vendor from Costume of the Lower Orders of the Metropolis by Thomas Lord Busby brought me up short. How did she obtain her wares and who were the buyers? I still don't know, but a quick search led me to Eking out a living on the streets of Paris at a wonderful website to explore, Parisian Fields, and to A brief history of wallpaper at the Victoria and Albert Museum. Question: would you make the vendor your central character, or would one of your characters seek out cheap paper by going to a street market?