Wanting to report this glitch,
When you get your future read during the Dark Brotherhood quest (Optional reward) you start the quest Find the Assassin of old.
Found where the Assassin should be by pulling the lever behind the chair (Anyone thats done this will know what I mean,m dont want to spoil it for the others) but the quest marker is there and a chest yet the Assassin that should be lay on the floor isnt there.