The hill also is noted in the work of such local writers as W. H. Davies and Arthur Machen. Machen described it in his autobiography Far Off Things (1922): As soon as I saw anything I saw Twym Barlwm, that mystic tumulus, the memorial of peoples that dwelt in that region before the Celts left the Land of Summer. This description was borrowed by Dylan Thomas for Llareggub Hill in his Under Milk Wood. Local historian and folklorist Fred Hando tells of the Mountain Organ produced by the wind on the southern slopes of the hill, and of the nearby Pool of Avarice the site of a great house which was swallowed wholesale by a landslip after the mistress of the house had turned away a hungry beggar. The Cistercian Way (a waymarked, circular, long distance footpath developed in 1998) passes through Llantarnam, Old Cwmbrân, Greenmeadow and Thornhill before reaching the ancient chapel of Llanderfel on Mynydd Maen, and then onwards to Twmbarlwm.