Correspondence:
- MS 342/13;D Letter to Edward RGR Evans, 22 March 1910 [Regarding his exclusion from the British Antarctic Expedition, 1910-1913] holograph
- MS 1368/16;D Letter to Hartley Travers Ferrar, 20 April 1931 [Personal news and mention of mutual friends of British Antarctic Expeditions] 1 leaf, holograph
- MS 656/2;D Letter to John Kendall, 16 November 1950 [Regarding scurvy during the British Antarctic Expeditions] 2 leaves, autograph
- MS 100/121;D Letter to Hugh Robert Mill, 29 April 1929 [Thank's for summary of Mawson's career] holograph
- MS 641/4;MJ Letter to Charles William Rawson Royds, 10 December 1902 [Written from 4,000 ft. at foot of Western mountains, British National Antarctic Expedition, 1901-1904] autograph
- MS 342/14/1-11;D Letters (10) to Robert Falcon Scott, 3 June 1907 to 16 October 1912 [Letters 5 to 7 mention the British Antarctic Expedition, 1910-1913] 35 leaves, holograph
- MS 1476;D Letter to James Wordie, 17 August 1944 [Comments on character and conduct of Albert Armitage during the British National Antarctic Expedition, 1901-1904] 3 leaves, typed transcript (carbon)
- MS 342/16;D Letter (fragment) to unknown correspondent, 22 December 1901 [Proceedings of the British National Antarctic Expedition, 1901-1904] holograph
Testimonials:
- MS 342/17/1-6;D Miscellaneous testimonials, 1890-1905