Redlynch is in the old Downton parish, so right on the border with Hampshire / Dorset. So, it is not surprising that your grandfather made a mistake in the county. In fact, that part of Hampshire was once in Dorset, and a neighbouring parish was once in Wiltshire but is now in Hampshire. Looking at a road map, it looks possible that the cottage might actually be on the boundary, so it is no wonder he got confused. pwholt