Need a unique grayscale illustration

I am looking for a talented artist/illustrator who can create a clean quality grayscale illustration that portrays a scene from a book.

The book is about old bridges. The scene is that of a prehistoric woman crossing a narrow deep gorge in a forested area by swinging from one tree (on one side of the gorge) to another tree (on the other side of the gorge) using tree vines.

The illustration needs to:
1) show the gorge (and the fact that it is not possible to cross it other than swinging from the trees that surround it),
2) a wide portion of the forest on either side of the gorge (the illustration should not have a narrow focus; a wide-angle lens is needed to illustrate the scene)
3) one prehistoric woman swinging across the gorge from tree to tree, and
4) a few other prehistoric people (men and women) on both sides of the gorge on the floor of the forest (not on trees) as if they have either crossed the gorge or are getting ready to do so.