In reply to Trangia:
You're welcome to a copy of my navigation notes & resources for teaching DofE participants. They're intended as a reminder for an instructor (and so are hierarchical bullet point notes), but they address most of the techniques of navigation, and describe a process for following a route, which I find is often missing in books on navigation; they usually cover the techniques, but don't give a process.
No pretty pictures (except for an example route on a map, and some diagrams of using a compass and correcting for GMA).