Start at (a) where a twitten runs from the the south corner of Moustows Manor and the High Street to Henfield Common North. Continue along Henfield Common North to where it joins a raised track at (b), which runs to the Brighton Road. Take the track to the main road and cross it by Mill Drive (c). A few yards east of Mill Drive is the open path at (d) which leads up to the Mill House at (e). This path runs along the right-hand side of Mill House, through a twitten and emerges at the western end of the Lydds. Follow the footpath along the length of the Lydds - enjoying superb views of the South Downs - to a point where it becomes a lane which runs downwards to Holedean Farm at (f). The lane does a sharp left turn at (f) and runs upwards to Lydds House at (g). At Lydds House, the lane turns right and runs down to the Brighton Road - cross the road and join the south path along the common at (h). Walk back to (c) and you've completed most of the walk.