The Horse Wheel was originally located at Shabden Park in Surrey, where it had fallen into disrepair. It was transported to Greys Court in 1973 and restored by the Berkshire Industrial Archaeology Group. The Horse Wheel would have been turned by a pair of horses to operate machinery to pump water from the well to a slate water tank in the roof of the shelter. Unfortunately, the slate water tank did not survive the transportation from Shabden Park.