Another portrait update

This is another small update on the portrait of my mother.

I'm working on the patterning on the sofa cover, trying not to make it too strong and distracting.  As it takes up two thirds of the surface, I still have a ways to go, so I'm doing other little pieces in between to stop the boredom setting in.

I have told you that this is done on Stonehenge, but as I noticed the watermark tonight, I realized that its Somerset.  That would explain why its shedding as I blend or brush it.  The charcoal works well on this but doesn't give as smooth a gradation of values as I would like for portraiture.  But too late to turn back now!