"Zumalacárregui" by Benito Pérez Galdós is a historical novel published in 1898. Set during the First Carlist War of 1834-1835, the story follows the military campaigns of Carlist leader Tomás de Zumalacárregui through the eyes of José Fago, a chaplain serving the pretender to the Spanish throne. The narrative traces the Carlist conquest through Navarre and the Basque provinces, culminating in the dramatic siege of Bilbao where the celebrated general meets his fate. (This is an automatically generated summary.)