Fred was driving home from one of his business trips, in Northern Arizona, when he saw an elderly Navajo man walking on the side of the road.

As the trip was a long and quiet one, he stopped the car and asked the Navajo man if he would like a ride.

With a silent nod of thanks, the Indian got into the car.

Resuming the journey, Fred tried - in vain - to make a bit of small talk with the Navajo man.  The old man just sat silently, looking intently at everything he saw, studying every lit