- FondsJeffreysB - Papers of Bertha Jeffreys
- SeriesE - Lectures
- SubseriesE54-E91 - Public and invitation lectures
- 3 more...
- ItemE57 - 'Elementary applications of vectors & tensors', ?Mathematical Association, Bristol, 1931 or 1932
- ItemE58 - Untitled lecture on mathematics for physicists, Cambridge Physical Society, 2 March 1944
- ItemE59 - 'Atomic wave functions', Trinity Mathematical Society, Cambridge, 16 November 1944
- ItemE60 - 'Stability', The New Pythagoreans, Cambridge, 1952
- ItemE61 - 'The conflict of studies', Mathematical Association Sydney branch, Australia, 31 July 1959
- ItemE62 - 'Top People take the Times', Oxford, ?1960
- ItemE63 - Untitled lecture at Royal Holloway College London, ca 1960
- ItemE64 - Untitled lecture to 'GPDST [Girls Public Day School Trust] Mathematics Teachers', 1966
- ItemE65-E67 - 'SEMINARS. Various Dallas 1967'
- 13 more...