Out of the grey, into the dark: Sight size 4

Starting at the top of the head, and working down. Adding dark and light to the head. The form starts to emerge.

 

Now it starts to make sense: I start to see why the earlier stage took so long. Making sure they were correct makes this stage easier (relatively!): the shape, size, and midtone are in place, so now "all" I have to worry about is the form and volume.