" 56. They all flew away into the west. At this point in the novel Pa delivers this haunting line, 'I would like some one to tell me how they all knew at once that it was time to go, and how they knew which way was west and their ancestral home." Prof. Lockwood commented, 'Locusts were then-- and still are-- mysterious creatures, whose sudden, irruptions are their defining attribute. "

― Laura Ingalls Wilder ,