The hair is beginning to take shape now. There is still a little way to go be adding more tones, but they are necessary. Whilst there are a few fine strands of hair, this is not a hyper-realist painting. Whilst I admire the skill and technique of such artists, I personally like to see brush strokes, which help to convey emotion from the artist and in the subject.
I will leave the hair for a while and return at a later stage, as I feel the need to work a little on the jacket to make the composition more unified.