Everest in Easy Stages

Everest in Easy Stages was a book owned by the Fourth Doctor. On Chloris, the Doctor began reading it for hints on how to climb out of the pit. However, it was written in Tibetan so he had to consult another book, Teach Yourself Tibetan. He translated the opening line of Everest in Easy Stages to "Do not be afraid". (DW: The Creature from the Pit)