Almost the greatest loss to country scenery is the decay of the ancient windmills and water-mills. The first has robbed the hilltops of a most picturesque feature, while in the valleys and little glens the roaring, creaking, dripping wheel sounds no longer, except in favoured spots where it still pays to grind the corn in the old way. The old town and city mills often survived longer than the country ones, and those on the Thames longer than those on smaller rivers.