Complex sentence: On his death the estate passed to his younger brother, the 7th Earl, and then to the latter's son the 8th Earl, who bequeathed the estate in turn to his second natural son Captain Henry Lumley-Savile.
Split into simpler sentences: On his death the estate passed to his younger brother, the 7th Earl, and then to his son the 8th Earl. The latter bequeathed the estate to his second natural son Captain Henry Lumley-Savile.