I thought the symbol in Escher's lab papers that looks like an upside-down monkey's tail with rays eminating from its head was a part of the game. The same symbol appears on Escher's sash. I drew that symbol while in the Noloben bubble after seeing it in the lab and my slate disappeared and hasn't turned up on any pedestal - and I can't complete Noloben now because I have no slate to draw the snake symbol on.
Any ideas on how to get to whereever the "monkey-tail symbol" took my lost slate?