Illustrator Line Work

I did lectures today on using Illustrator brushes to do line work. I am using as a masterwork a Poison Ivy sketch by Bruce Timm that I got off of Heritage Auctions. I went over the different brush tools including the vector pen, calligraphic brush, art brush, and the blob brush. The blob brush is by far the easiest to use if you have a wacom tablet and pen. If you don't have those I would recommend working with custom art brushes.

Here is the original image:

Here is the copy that I made in Illustrator: