A page from Cook's 1906 diary showing his map of Ruth Glacier. Some of the original diaries Cook kept have survived. Their location is indicated below: 1891-92 North Greenland Expedition: None known 1893 Zeta cruise: Library of Congress 1894 Miranda cruise: Explorers Club of New York 1897-1899 Belgica expedition: Not located as yet 1901 Erik voyage: None known 1903 McKinley expedition: None known 1906 McKinley expedition: Library of Congress 1907-09 North Pole expedition: Library of Congress/Copy in Copenhagen, Denmark 1915-16 Everest expedition: Library of Congress

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