Complex sentence: The title was inherited by the late Baron's first cousin once removed, who succeeded as the ninth Baron; he was the third son of the Hon. William Harbord, a Captain in the British Army, and fourth son of the third Baron.
Split into simpler sentences: The title was inherited by the late Baron's first cousin once removed, the ninth Baron. He was the third son of the Hon. William Harbord, fourth son of the third Baron.