The project was much more difficult and messy than I expected and I quickly lost my will to finish the job. In my defense, it wasn't exactly as if I was sitting around eating bon bons while the hallway was resplendent in its shabbiness. And the unsightly hall was upstairs, so anyone who saw it either lived in the house or was invited upstairs, meaning they were expected to love us enough to overlook our disfigured hallway. As the photos demonstrate, that was a tall order.
One reason to complete the project in chunks is the sheer mess of the job. Even if I had set aside a few days to just get it done, I'd still have to stop every hour or so and sweep away the mess. For one thing, the detritus makes the stairs slippery. For another, the wet wallpaper adhesive remains sticky and will easily adhere itself to the floors. A drop sheet would help, though a slippery sheet of anything on the stairs seems like a very bad idea.