 Many landscape features, from the barren granite rock features on Bodmin Moor, to the dramatic cliff seascape, to the mystical form of St Michael's Mount are explained as the work of Giants and English tales such as the early eighteenth century Jack the Giant Killer may recall much older British folk traditions recorded elsewhere in medieval Welsh language manuscripts and closely related to the folk traditions of Dartmoor in neighbouring Devon.Old Michaelmas Day falls on 11 October (10 October according to some sources).According to an old legend, blackberries should not be picked after this date.