Three Dunmer Ghosts can be found when retrieving the Crown Of Barenziah in Tolvald's Cave after finding all 24 Unusual Gems (Stones of Barenziah) during the quest No Stone Unturned. They are the ghosts of the ambushed Dunmer caravan of refugees from Morrowind. One of the ghosts appears to be sitting next to her skeleton and was a battle mage prior to being in the caravan as can be learned from the journal where she is sitting. This ghost will at times respond to spells equipped if you have them "unsheathed". The second appears to be wearing full elven armor but does not appear to have any dialogue options. The second ghost is located to the right of the Crown of Barenziah beside a pillar.