Board Thread:Skyrim/@comment-130.36.62.222-20150623152551/@comment-6881629-20150623154601

Try staying away from the area for thirty in-game days the area reset might move him back to town, he's also moved to the Thalmor Embasy for the quest Diplomatic Immunity if you haven't done it yet that might put him back in the right place after the quest is done (again lots of might's i'm afraid). On a PC you could try the command -

prid 000198A9

moveto player

That would move him right to you.