Correspondence with G.E. Wilford (Geological Survey Brunei), 12 December 1957-21 November 1963 Date: 1957-12-12/1963-11-21
Correspondence with Gilbert Archey (Auckland), 16 November 1927-26 January 1940 Date: 1927-11-16/1940-01-26
Correspondence with Gilbert Henry Dutton (Glamorgan, Sunderland, Adelaide), 16 December 1918-20 May 1921 Date: 1918-12-16/1921-05-20
Correspondence with G.M. Philip (Cambridge, Armidale), 01 November 1959-26 November 1965 Date: 1959-11-01/1965-11-26
Correspondence with H.A.Allen (Geological Survey and Museum London), 21 November 1903-14 August 1907 Date: 1903-11-21/1907-08-14
Correspondence with H.D. Fletcher (Australian Museum, Sydney), 07 October 1952-29 October 1955 Date: 1952-10-07/1955-10-29
Correspondence with Heather Leed (New Zealand Geological Survey), 08 February 1951-04 February 1952 Date: 1951-02-08/1952-02-04