turning now to the elves , beren is here of course still an elf ( see p. 139 ) , and in his second span of life he is the ruler , in hithlum -- hisilome , of an elvish people so numerous that 'not even beren knew the tale of those myriad folk ' ( p. 234 ) ; they are called 'the green elves ' and 'the brown elves and the green ' , for they were 'clad in green and brown ' , and dior ruled them in hithlum after the final departure of beren and tinuviel .