He is treating of the dethronement of kings.

They are a dominion convulsed with revolutions; coronations and dethronements in ceasless successioneach ruler a usurper and a despot.

She had, as we have seen in the previous chapter, been supplanted by one sister in the King's affection; and just as she was recovering some of her old position in his favour, she was threatened with a second dethronement by another sister.