Hi Richard,
You missed it within a hair's breadth, native Hungarian (a tiny land near Russia) but living in Germany. So I don't understand it. (Kok=How?)
Scott wrote, he stopped using Burnt Sienna for underpainting. I use Raw Umber, an once tried verdaccio.
You can still buy Sheppard's book, it is interesting (and you need no basics, what I need)
Oh yes,it is a problem, all underpainting by me is too dark...