- FondsJeffreysB - Papers of Bertha Jeffreys
- SeriesE - Lectures
- SubseriesE54-E91 - Public and invitation lectures
- 6 more...
- 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'
- ItemE68 - Untitled lecture, November 1969
- ItemE69 - 'Four minute mile', Singapore Mathematical Society, 30 April 1971, and Leicester Mathematical Association, autumn 1971
- ItemE70 - Lunchtime talk on travels of mathematicians, The Archimedeans (Cambridge University Mathematical Society), Cambridge, 1972
- 10 more...