-- in the outline associated with the poem 'the bidding of the minstrel ' earendel 'sets sail upon the sky and returns no more to earth ' ( p. 261 ) ; in the prose preface to 'the shores of faery ' 'to eglamar he comes ever at plenilune when the moon sails a-harrying beyond taniquetil and valinor ' ( p. 262 ) ; in outline c 'he can not now return to the world or he will die ' ( p. 255 ) ; and in citation ( xix ) above he 'returns from the firmament ever and anon with voronwe to kor ' .