211 ) : 'osse set them in a great ring about the western limits of the mighty sea , so that they guarded the bay of faery ' , and all such as stepped thereon came never thence again , but being woven in the nets of oinen 's hair the lady of the sea , and whelmed in agelong slumber that lorien set there , lay upon the margin of the waves , as those do who being drowned are cast up once more by the movements of the sea ; yet rather did these hapless ones sleep unfathomably and the dark waters laved their limbs ...