Complex sentence: Ailesbury was after more than 20 years older than Charlotte; more importantly he had fled England to avoid being condemned as a traitor and though the British Crown had not seized his estates he was only able to draw part of the revenue.
Split into simpler sentences: Ailesbury was after more than 20 years older than Charlotte; more importantly he had fled England to avoid being condemned as a traitor. Though the British Crown had not seized his estates he was only able to draw part of the revenue.