"Fahrad did, it's where he took me. It seemed the safest place to stay while the Red Dragonflight was still searching for me."

Not that he, at the time, particularly had a good sense of where may be safer -- but a building frequented by thieves and assassins was fairly well protected. Wrathion slows and turns to Anduin, hesitant.

"Fahrad liberated me from Vermillion Redoubt where the Red Dragonflight had hidden the results of their experiments, kept me safe in Ravenholdt as long as he could. We worked together for some time."