As a rule, the motive for the reappearance on earth of a spirit lately tenanting a mortal body, is found in some neglected duty. The spirit of a suicide is morally certain to walk: a reason why suicides are so unpopular as tenants of graveyards. It is a brave man who will go to the grave of a suicide and play 'Hob y deri dando' on the ysturmant (jew's-harp), without missing a note. Many are the tales displaying the motive, on the ghost's part, of a duty to perform--sometimes clearly defining it, sometimes vaguely suggesting it, as in the story of Noe. 'The evening was far gone when a traveller of the name of Noe arrived at an inn in Pembrokeshire, and called for refreshment. After remaining some time he remarked that he must proceed on his journey. "Surely," said the astonished landlord, "you will not travel at night, for it is said that a ghost haunts that road, crying out, The days are long and the nights are cold to wait for Noe." "O, I am the man sought for," said he, and immediately departed; but strange to say, neither Noe nor the ghost was ever heard of afterwards.'[66]