A number of years ago I was hiking along the Salmon River and came across a grove of pine trees that had been partially stripped of their bark. I knew from a friend who is a forester that the Native Americans who hunted this area long ago had peeled the outer bark and harvested the underlying layer for chewing gum. Some of the scars were disfiguring, but others, filled with crystallized sap and burnished by wind and weather, had been transformed into patterns of rare beauty.