On a visit to Murray's cheese caves, no spelunking equipment is required  In a crayon-scribbled children’s book inherited from my older sister a few decades ago, there’s a picture of a little girl running barefoot with a couple of goats on a green hill in Switzerland. In the story, the little girl named Heidi has come to live with her grandfather in a spartan log cabin high in the Alps, where he welcomes her with a bowl of goat milk, bread and cheese: simple food for simple folk, born of what he