She is as tireless as a gun dog; and while we laugh at her single-mindedness, we also stand in awe of it. In her Old Testament morality, in her legalistic and exacting turn of mind, in the thunderous blackness of her wrath “What a waste! . . . I would not rest easy until that Louisiana cur was roasting and screaming in hell!” she is less Huck Finn’s little sister than Captain Ahab’s.