2.12.1  I'm underwater with the two giant statues.  How do I
            pull the lever?

            There could be one of two problems here.  The first is
            that you're trying to pull the wrong lever.  It's the 12th
            level.  Surely you must be able to tell the difference
            between a switch and an underwater lever?  If Lara is
            facing the switch on the right statues elbow, take a close
            look at it.  You'll notice that there is a horizontal
            lever that can only be pulled down if Lara is standing in
            front of it on dry land.  Swim deeper between the statues
            feet and you ought to find a lever in the tunnel that is a
            vertical lever.  Maneuver Lara in front of the lever and
            press the action key.  She should put her feet against the
            wall and give the lever a heave.

            Once in a while you may find that Lara lines herself up
            with underwater levers but refuses to pull them.  This
            happens very rarely and appears to be some kind of game
            engine bug.  Just swim to the surface, recharge the air
            meter, and swim down and try again from a different angle.
            If it's an underwater lever, Lara will eventually pull it
            down.