Portraits - A welcome diversion

Well, my 'masterpiece' while almost finished has stalled for a while, as I am in the process of moving house. So I have been busy packing. But I found the time while I was feeling inspired to do some portrait sketches using a Calligraphy Pen 1.0.  It is quite different to what I have been doing. The challenge is deciding how to differentiate the pen strokes for shading/shadow vs actual facial features and portraying shades of colour on the face. Anyway this is what I came up with.  Both Pro Surfers, Bede Durbidge, and Occy