The great, tender, plain-spoken Don Williams, “gentle giant” of a Zen country music of grace and soul, has died at 78. Country? We know. But it’s a grievous loss for those of us who once listened to him on 8-track in pick-ups gliding through the beatific woods. Williams’ songs, said the Country Music Hall of Fame, were “a balm in troublesome times, (offering) calm, beauty, and a sense of wistful peace.” May his voice endure, till the rivers all run dry.