The book describes how Morris, fearing despatches might be read (hacked) by journalists from some rival paper, devised a code which would deceive and mislead by implying failure: Advanced Base Abandoned would mean Edmund Hillary
29 May 1953
The summit of Mount Everest, highest mountain in the world, was first reached: by the Sherpa Tenzing Norgay
and the New Zealander Edmund Hillary
(who was later knighted).