Before that, I want to get all "artsy" on ya'll. This kind of drawing at first glance can look pretty simple in comparison to the last two. However when you take a subject and break it down strictly to line, you then give that line a LOT of responsibility. That single line needs to convey form, depth, texture, weight or gravity, motion, even mood. That can be a lot to ask for one line, but when done well, you are able to capture all of that and more.
Cartooning is by definition conveying form with only line. During the Renaissance a cartoon, or line drawing was made on a large sheet of paper then transfered to wet plaster for painters to apply a fresco on top. They used the "cartoon" as a map, or an underdrawing for structure to then apply a more rendered painting over it. The painting becomes the finished product, the cartoon was just a step in the process. In a more modern sense we associate the same term with Disney movies, Looney Tunes and the like. It has grown from newspapers, comic books, tv shows and movies to what it is today.
I learned from a professor I had at college to respect the simplest drawing, because it is using far less than it could to tell you what you need to know. That the artist who created it respected those lines and knew how important each one was for the drawing to work.
I run into this everyday, with every face I draw. A simple line drawn to high or low, to the left or right, just barely "off" will completely change a person, or their expression.
In this sketch I wanted to keep it to just lines, give a lighter feel to the drawing it self, but more just a study of line.
Castlevania Week: Sypha - 119