Complex sentence: The Mesdames were warned and left the chateau in the carriage of a visitor before having the time to bring their baggage wagons, which were, however, protected and sent after them by general Alexandre Berthier.
Split into simpler sentences: The Mesdames were warned and left the chateau in the carriage of a visitor. They did not have the time to bring their baggage wagons; these were protected, however, and sent after them by General Alexandre Berthier.