The first image is the initial under-painting of the portrait; a general outline.  after that was putting in more tones, which is the second photo.  The third one has a start of adding color in it, along with the last photo on the right (fourth one) that has more contrast, tone, and value.  This was a process of adding and subtracting oil paint pigment with linseed oil and trying to make the hands and the face the focal point.  This is  20″x16″ painting on canvas.  The featured image on the top is the final product.