"It is in the heart of the Sierra Madre range, one hundred and twenty-five miles west of Zacatecas," said the dying man. "Across the blue chasm you can see its towers and turrets glistening in the sunshine. It is like a beautiful dream-dazzling, astounding, grand " "He wanders in his mind," softly declared Professor Scotch. "Poor fellow His brain was turned and he was brought to his death by his fruitless search for the mythical Silver Palace."