Skull Drawing

This is a drawing of a skull I created in my Visual Studies at college.
I was given a skull and made small visual sketches of it, before using chalk and charcoal on black paper to create the whole skull.
I like this piece because it took a long time to get the shading to look right, and the shapes are all similar to the original skull I drew from. I dislike the centre of the drawing (where the nose would be) because I had to finish it quickly and I found the shapes very complicated and hard to draw.