The reason the dwarves could not decipher the glyphs is because there is nothing to decipher. The shifting outer layer of the prism must properly align with the inner crystal's markings in order for the message to be transmitted. Clever...$B$BWhile we should be able to translate this data, we must first unlock the code. There is only one clue on the surface of the prism - assuming the rubbings were transferred correctly - and it looks grim.