The Cliffspring River has begun turning foul and corrupted.  It empties into the Mist's Edge, and I fear the wash will affect Auberdine soon.  I suspect the Blackwood furbolgs up-river are the cause of the taint, but I also suspect that they aren't the true root of it.$B$BTake this sampling tube and go to the mouth of the river to our north.  Proceed inland to the first waterfall and draw a sample from the pool there.  You'll see a bridge overhead.  Once you have a sample, return to me in Auberdine.