Complex sentence: Prior to 1830 Hedsor Wharf, on the upper reach of Hedsor Water had been an important trading port and was used to ship the paper made at nearby Cookham Paper Mill. The stone used to build Shardeloes was brough from Oxford to Hedsor Wharf.
Split into simpler sentences: Prior to 1830 Hedsor Wharf, on the upper reach of Hedsor Water had been an important trading post. The paper made at nearby Cookham Paper Mill was shipped from there and the stone used to build Shardeloes was brought from Oxford to Hedsor Wharf.