Céolflad has asked that you search for yarrow to see if Aldstan's wound can be staunched.
'This wound is no good!
'Please, stranger, find some yarrow, if ye can! I hope the snow hasn't buried it all. I'll need plenty of the leaves, and some snow to pack it on with.'
Yarrow and snow can be found to the east of the refugees' cave in the northern High Knolls.
You should collect yarrow and snow for a poultice to try to save the Thane.
Céolflad can be found in the refugees' cave north of Byre Tor in the High Knolls.
You should return to Céolflad with the yarrow and snow.