Gillemin Brandybuck believes the great spider-nest could also be contributing to the stirring of the Old Forest.
'One thing I know about spiders is that they typically move in broods. At the head of the brood, you're likely to find a queen -- a female that cares for, watches over, and commands the lesser spiders.
'I gather that there is a brood-matron in that hollow. Though I am not certain where, as I did not see her.
'Be wary, and if you do find her, let me know, and I will see that you are rewarded. The hollow is just beyond the river to the south... you will know it by the webs hanging from the trees.'
The spider-nest lies near the Willow Glade, to the south of Gillemin's old camp.
Gillemin warned that you should be wary of a matron within the spider-nest.
Gillemin Brandybuck awaits you at his new camp, south-east of Old Muddyfoot's Hill.
You should return to Gillemin Brandybuck with news of your success.