Keywords: Mallory's revised map of northeast of Everest.jpg Mallory's revised sketch map Page 217 from Howard-Bury C K 1922 Mount Everest the Reconnaissance 1921 1 ed New York Longman Green Original publication New York<br/> Immediate source http //www gutenberg org/files/39421/39421-h/39421-h htm 1922 George Leigh Mallory<br/> Life time 18 June 1886 “ 8 or 9 June 1924 PD-old-auto-1923 1924 Original upload log en wikipedia Mallory 27s+revised+map+of+northeast+of+Everest jpg 2014-06-15 18 54 Thincat 400×254× 31278 bytes <nowiki> Summary Mallory's revised sketch map Page 217 from Howard-Bury C K 1922 Mount Everest the Reconnaissance 1921 1 ed New York Longman Green Original publication New York<br/> </nowiki> 1921 British Mount Everest reconnaissance expedition George Mallory |