Have You Been Waiting Long?,
Halnaker Mill was first mentioned in 1540 as belonging to the manor of "Halfnaked". It was built for the Duke of Richmond as the feudal mill of the Goodwood Estate. The surviving mill is thought to date from the 1740s and is known to have been standing c.1780. Halnaker Mill was working until struck by lightning in 1905, damaging the sails and windshaft. The derelict mill was restored in 1934 by Neve's, the Heathfield millwrights as a memorial to the wife of Sir William Bird. Further repair work was done in 1954 by E Hole and Sons, The Burgess Hill millwrights. The mill was again restored in 2004. The mill is owned by West Sussex County Council. So I guess you have waited a long long time.