Complex sentence: The chalybeate springs of Dorton Spa outside Brill were already well known for their supposed healing powers, and a resort had been built around the Spa in the 1830s, featuring a modern pump house and eight baths, all set in of parkland.
Split into simpler sentences: The chalybeate springs of Dorton Spa outside Brill were already well known for their supposed healing powers. In the 1830s a resort had been built around the Spa, featuring a modern pump house and eight baths, all set in of parkland.