Complex sentence: After her father retired as rector, she moved with him and her sister Diana in 1896 briefly to Condover Hall, which they had inherited from Reginald, and then sold it and moved to Albert Gate Mansions in Knightsbridge, London.
Split into simpler sentences: After her father retired in 1896, she moved with him and her sister Diana to Condover Hall, which they had inherited from Reginald. They sold it and moved to Albert Gate Mansions in Knightsbridge, London.