now it was mavwin 's thought that perchance turin dwelt yet in the thraldom of the dragon and it might fall to them in some manner to liberate him , or again should the prowess of the king 's men suffice then might they slay the worm in vengeance for his evils , and so at his death might he speak words of knowledge concerning the fate of turin , were he indeed no longer nigh the caverns of the rodothlim .