'Black birds flittered and fluttered, skipping among the branches. They came to rest where the restless walk. Beware the old barrows, they stir when they should be a-sleeping!
'Go north up the path and follow the Old Barrows Road, then south within the barrows wall along the forest eaves. Hey dol! Merry dol! And there you'll find them! Watch for the lady dreary.
'Now hop along, my hearty! Tom's a-going leaping!'
Tom Bombadil was pleased with the lilies you found for Goldberry and has told you where the crebain you were searching for can be found. He also told you that a woman was there waiting.
The Barrow-downs are reached by going north and east along the Old Barrows Road. The crebain stopped to roost in the trees within the Barrow-downs, south along the ridge, above the eaves of the forest.
Tom Bombadil found the crebain within the Barrow-downs, but also mentioned the presence of a woman. You should stay on your guard.
'Fool! Did you really think you could keep my pets from seeing all? Did you think that my pets would not learn that the Ring is no longer amongst those little buffoons and travels east in the hands of a hobbit named Frodo Baggins?
'you have failed utterly! When my master, my great King and Lord of the Nine, returns from Othrongroth, I shall tell him all that my pets have seen. And I shall tell him of how I brought about your death!'
The Old Barrows Road is north of Andraste's grove. The house of Tom Bombadil is west and south along the Old Barrows Road.
Andraste revealed that the Lord of the Nazgûl had gone to someplace called Othrongroth, but you could learn nothing more before her death. Tom Bombadil is the Master of the Wood and of the Barrow-downs. He might know where Othrongroth lies.
'Ho there! Stay awhile! Or are you still a-hurried?
'Othrongroth, you say? That's a dark place, full of dark wights, and you've no need of going.
'If you must, you must, and I'll not be staying you. Very well, come closer, and I'll be telling you.'
You will have to fight Andraste and the surrounding creban, which are near ;loc: 32.7s, 55.8w.