Who are the duchess in black beauty?

In "Black Beauty" by Anna Sewell, the Duchess refers to a high-spirited mare owned by the character Lady Anne. She is depicted as a proud and noble horse, often showing a strong will and a desire for freedom. The Duchess embodies the themes of dignity and the humane treatment of animals, contrasting with the mistreatment faced by many horses in the story. Her character highlights the importance of compassion and respect for all creatures.