Copy of typescript letter sent by Sir John Gerald Lang, Permanent Secretary of the Admiralty, to V Adm Sir William Gerrard Andrewes, Commander in Chief, America and West Indies Station, regarding the efficiency of the cryptographic staffs of HMS SUPERB and HMS SNIPE during naval operations in the Antarctic, 13 Apr 1953

Papers of David Linton, comprising: Notebooks and loose sheets of notes, [1926-1971], containing geographical and geological field notes on land formation in Great Britain and other regions, including Canada, 1952, United States of America, 1952 & 1965, Antarctica, 1958, South America, 1959, Scandinavia, 1960, and South Africa, 1967; assorted photographs, [1960-1969]; obituary, 1971.