Skull Drawing - Frontal View

For this drawing I used 60 lb medium-tooth paper and a range and Staedtler pencils ranging from F through 8B.  This is the first time I included a hard charcoal for the darkest areas, used various tortillons (blending stumps) and wore cotton gloves to prevent accidental smudging.  On another note, I am dreaming of skulls - I don't know if I should be worried. :)