because of their love , despite the haste and their fear of the advent of new foes , tuor let raise a great stone-cairn over glorfindel just there beyond the perilous way by the precipice of eagle-stream , and thorndor has let not yet any harm come thereto , but yellow flowers have fared thither and blow ever now about that mound in those unkindly places ; but the folk of the golden flower wept at its building and might not dry their tears .