Complex sentence: In 1831 Mr Riley went back to France and purchased ten females in kid and two bucks from Mr Polonceau and sent them to Australia; at the time the average production of the Polonceau herd was 16 ounces (500 grams) of down.
Split into simpler sentences: In 1831 Mr Riley went back to France and purchased ten females in kid and two bucks from Mr Polonceau and sent them to Australia. At the time, the average production of the Polonceau herd was 16 ounces (500 grams) of down.