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Logan | Sir | William Edmond | 1798-1875 | head of the Geological Survey of Canada

  1. Letter to Sir Charles Lyell from William Benjamin Carpenter (1865)
  2. Correspondence of Sir Archibald Geikie: Canadian geologists (1872-1900)
  3. Letter to Sir Andrew Crombie Ramsay from Sir John William Dawson (1875)