I decided to work on a monochrome Neil Gaiman watercolour portrait, and I remembered to take progress photos for a change.
The initial sketch was done with a Faber Castell 9000 2H on Bockingford 300gsm watercolour paper.
Then I did some light initial shading (I use Schmincke watercolours):
This is with most of the work done:
Final pass, differentiating more between light and dark: