Ok so I have read through all the threads and I just need to ask one question.
I have the 1st and 3rd tablets which I found by accident- well accidentally on purpose anyway. Now tablet no 2.... I have been to the crab cages and dived down and can't go anywhere when I get there. Have I missed something? Please help .....

Sometimes it's hard going down that tiny shaft. If you have a smaller character (dwarf, pixie, gnome, ratling) select them when swimming. It's the crab cage on the near right as you enter the room. Swim down, then down the lower corridor, then back up. The tablet is in a chest in the room you enter.

-Sazerac

Oh, yeah...if you do get stuck, wiggle like a worm or switch back and forth between characters.

-Saz

Look at the roof for a tiny little hole which doesn't show up on the map and which you WILL miss unless you search for it at the end of the corridor...

I hate that tiny hole...