there is indeed scarcely any linking reference to other events , and of course no trace of the grey-elves of hithlum who in the later story fostered him , or of his outlawry and hunting by the easterlings ; but there are 'wandering noldoli in dor lomin ( hisilome , hithlum ) -- on whom see p. 65 -- from whom tuor learnt much , including their tongue , and it was they who guided him down the dark river-passage under the mountains .