As a compromise settlement, could Spain be divided essentially permanently, with the Carlists turning their strongholds into the Kingdoms of Aragon and Navarra, under the PU of Infante Carlos, with the government of Isabella controlling the rest of the country? This could either be a long-term armistice, with neither side renouncing claims on the other, or as an official settlement, where both parties regarded as legitimate by the other. In either variant would this be a likely solution, or an unacceptable pseudo-compromise?