Russ Ryles was kind enough to send me a set of over-sized hand written maps for digitization and inclusion on Stamp Smarter. You can view/download these here
http://stampsmarter.com/learning/Postal_Maps.htmlNote, I spent a day trying to develop a slick morphing of these maps to illustrate how postal routes evolved over time but the deltas and inconsistencies of the hand drawn maps resulted in an unsatisfactory demonstration.
Don