Complex sentence: In the pastoral days the it was known as as Back Plain then Rosewood Scrub was opened there in 1878, but changed to Minden in 1879, after the town of Minden in Westphalia, Germany.
Split into simpler sentences: In the pastoral days the town was known as as Back Plain. A post Rosewood Scrub was opened there in 1878, but changed to Minden in 1879, after the town of Minden in Westphalia, Germany.