Step 5. We put light shadows on cheekbones at Lew, then we start drawing of lips. An upper lip at it very thin, we allocate more darkly the line of a mouth and corners of a mouth.
Step 6. We apply patches of light on lips. We start drawing a bristle. We put shadows, then we study details.
Step 7. We put a shadow under a lower lip and we darken area round a mouth.
Step 8. We apply shadows on the rest of a chin and a jaw. We take a pencil 6B, we trace a beard hair, especially in dark sites.
Step 9. We are taken place by an eraser on shadows for opening of light sites, and chalk or white a pencil we draw hairs to give a gray hair.
Step 10. How to draw hair with a gray hair. At first we do shadows on an ear, then we paint over dark sites of hair.
We paint over further dark sites. It is not necessary to draw in detail each filament, it is better to define light and dark sites of hair, then in certain places to draw hairs.
We take the softest pencil and chalk and we draw locks of hair, trying not to mix.
Dorisovyvayem hair also we do shadows on the second ear.
Step 11. Having finished a face, we should not neglect other details, have to finish work in the same quality. On a photo shoulders and a neck therefore the author decided them to finish are only a little visible. We do sketches.
Step 12. We apply shadows on a neck, thus the author decided them to make very dark since the shadow falls. Then we draw hairs on a neck. Then we start drawing of a shirt.
Step 13. We finish to draw clothes and we watch a ready portrait of Doctor House.
Author: Luis Serrano, its site (source)
Translated the text I through the translator, grouped then the text that was readable, the translation not literal. Who will have corrections, additions, leave them in comments, I will change the text of a lesson.