Complex sentence: At its greatest extent it covered 400 acres (1.6 km 2) in 1853, but was reduced to 195 acres (789,000 m 2) in the 1890s, and subsequently reduced to 110 acres (445,000 m 2).
Split into simpler sentences: At its greatest extent it covered 400 acres (1.6 km 2) in 1853. It was reduced to 195 acres (789,000 m 2) in the 1890s; later to 110 acres (445,000 m 2).