I revisited my ink drawing of winter in the city. I fixed the composition of the wall using modern methods. I first re-drew the hatching lines. Then I lifted the wall onto its own layer using Photoshop. I used the Perspective tool to re-render it as a false three-dimensional object and replaced it into the scene. Lastly, I added more snow to cover up some of the seams, although I missed one on the far left.
This change makes me happy, since now the stone wall suggests a stronger foreground; before, the image seemed too flat.