Bob Redthistle believes that the trees of the Old Forest in the southern Barrow-downs may yet be saved after a fashion.
'The corrupted trees must be purged out of the southern Barrow-downs but they may yet return to the natural fold. To determine this, I will need their seeds.
'Collect their seeds and return them to me. If they can be saved, I will see that the seeds are brought to a place where they can grow into natural creatures once again.
'You will find the corrupted trees deep within the southern Barrow-downs where the walls of the Old Forest are too thick to pass beyond.'
There are corrupted trees from the Old Forest in the southern Barrow-downs. Bob Redthistle is at the Dead Man's Perch.
Bob Redthistle has asked you to collect seeds from the corrupted trees in the Barrow-downs and return them to him.