A Pencil Sketch From Life

I tend to try to make my life drawings and paintings looser these days, but I came across this pencil drawing I did a while ago and was very happy with the greater level of detail I had achieved.
This one is similar in character to the pencil sketches I do for my illustration work in that it depends on line and careful shading to show form rather than the more painterly blocking in of light areas that I do with my paintings and charcoal drawings.