- FondsJeffreysB - Papers of Bertha Jeffreys
- SeriesE - Lectures
- SubseriesE54-E91 - Public and invitation lectures
- 20 more...
- FileE86 - 'Modern mathematics at the time of the Gunpowder Plot'
- FileE87 - 'The Shavian solar system'
- FileE88 - Untitled lecture beginning 'It is nearer to 50 than 40 years since I last read a paper to this Society'
- FileE89 - 'Pythagoreans'
- FileE90-E91 - Miscellaneous manuscript notes, probably incomplete or outline notes for lectures