I have two tablets; including the last one -- secret room between the two doors, however, I don't have one. I'm not sure if the missing tablet is the "first" or "second". Does anyone know the exact location of the first two????? Please spoil......

Well - if I remember correctly -
1 from the library
1 down the passage way in the crab cages
1 from the secret alcove (2 room puzzle)

Wyv

ER, secret room between two doors? I am looking for tablet number three (for after Christmas headache) are these two doors by Vemoura? Anything to do with the two rooms with levers I turned and can't figure out what they do. I kinda thought from the way the giggling serpent was talking I should have had three by now. HELP!

Ah, me and my headache went back a little farther and found a descriptive answer by Davros answering the question. Shall go find more glow stones and fiddle with levers.