The source of the river is at Stourhead, in Wiltshire, where it forms a series of artificial lakes which are part of the Stourhead bestate/b owned by the National Trust. meanders through villages and countryside. It flows south into Dorset through the Blackmore Vale b..../bbTarrant/b Launceston: a hamlet with a 3-arched 17th century bridge. bTarrant/b Monkton: a village with a parish church. bTarrant/b Rawston: a very small settlement. bTarrant Rushton/b: a village with a parish church. ...