PSA: DO NOT TAKE QUESTS FROM THE GENERIC GUARDS. The one who gave you the quest will probably not come back; that individual will be replaced by a steady supply of clones, each of whom will happily give you a new quest and then not come back either.
I knew I probably wasn't supposed to get quests from 'em, and I did it anyway. The cost of hubris is a clogged quest log. LEARN FROM MY DOWNFALL, MY FRIENDS.