Elder Farwhisper[78.4, 21.3] is a night elf quest giver located in Festival Lane in the dungeon instance Stratholme. Prior to the Cataclysm, higher level players with stealth could reach him via the Elders' Square service entrance.
Now, you can no longer go through the service entrance to reach Farwhisper the Elder. You must enter via the front entrance. Take your first left, then right (through the rat trapped gates) & then right again. You should see the Elder's on your screen by then.