In the second book of the Narnia series, titled The Lion, the Witch and the Wardrobe, Mr. Tumnus finds himself in a difficult situation. After his first encounter with Lucy, he shows her kindness and hospitality. However, in Prince Caspian, it is revealed that Mr. Tumnus has been captured by the forces of the wicked King Miraz. He is taken prisoner because of his allegiances to the free Narnians and for having aided Lucy Pevensie. This event underscores the ongoing struggles in Narnia against oppressive powers.
Throughout Prince Caspian, readers learn that Mr. Tumnus has become a symbol of the lost and oppressed Narnians. His fate reflects the changes in the world of Narnia, where many loyal creatures have faced dire consequences for resisting tyranny. Thankfully, by the end of the book, he is rescued, and this moment highlights themes of friendship, bravery, and the fight for freedom that are prevalent throughout the series.