I went through my sketchbooks and gessoed out all the stuff that wasn't interesting. In a few places I glued shapes of a different colour over dark places. The rose red was part of a paint chip I'd collected in Maine a few summers ago. I blended a bit of bluey gouache into the gesso.This morning I woke early and found some objects that would work with the direction of the red. The objects were not red.
Next I scanned the new image and printed it onto some cartridge paper. I worked without reference to the objects with a Matisse book opened.