Eager to graduate from the school on the hill, Phelan Cle chose Bone Plain for his final paper because he thought it would be an easy topic. Immortalized by poets and debated by scholars, it was commonly accepted-even at a school steeped in bardic tradition-that Bone Plain, with its three trials, three terrors, and three treasures, was nothing more than a legend, a metaphor. But as his research...