- FondsJeffreysB - Papers of Bertha Jeffreys
- SeriesE - Lectures
- SubseriesE54-E91 - Public and invitation lectures
- ItemE54 - Jeffreys's manuscript note found with lecture notes
- ItemE55 - Untitled lecture on developments in quantum theory, Adams Society (St Johns College Cambridge mathematics society), 1927
- ItemE56 - 'Quantum mechanics applied to everyday problems'
- 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
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