Pleasley Vale is a deep, narrow valley, much of which is wooded, which has been formed by the River Meden cutting down through the underlying limestone escarpment.The Vale has been the location for industry since at least 1767, when two forges and a corn mill are known to have been operating, powered by the river. The forges were run by George Sitwell, and were called Nether and Upper forge. The engineered river channel made it a good site for further development, and a consortium of businessmen from Nottingham and drapers from Mansfield leased the vale and Pleasley Park in 1782, in order to construct water-powered cotton mills. The Upper Mill was built first, on the site of the previous corn mill, and was operational by 1785. The Lower Mill was completed seven years later at a cost of £1,190, and was much bigger. A manager's house and a row of ten houses for the workers was also completed in 1792. The mills supplied cotton to the expanding East Midland hosiery industry. One of the original three businessmen was Henry Hollins, and by the early 18th century, the mills were run by William Hollins and Co. They were the first and one of the most successful cotton producers in the East Midlands.