for the interpretation of this passage it is essential to realise ( the key indeed to the understanding of this projected history ) that 'the faring forth ' does not here refer to the faring forth in the sense in which it has been used hitherto -- that from tol eressea for the rekindling of the magic sun , which ended in ruin , but to the march of the elves of kor and the 'loss of valinor ' that the march incurred ( see pp .