Hey, that explains why Narvi said that Celebrimbor "drew these signs". So, Narvi did not understand the signs? And Celebrimbor decided to play the joker and call the "Halls of the Dwarves" a "Dark Chasm"?
"Tell me, Legolas, why did I come on this Quest? Little did I know where the chief peril lay! Truly Elrond spoke, saying that we could not foresee what we might meet upon our road..." - Gimli the Dwarf.