It is not always easy for one to portray a person seated just a few feet away. Especially when they are facing forward.  Oblique views, or profiles are often less demanding and can be drawn with just a few lines (see Woman with Turban).

The portrait below is more about posture and gesture than it is about a face.

Lady Filling Out a Form
Pen and Ink Sketch
5.5″x8″ Medium Weight Vellum Finish