- FondsJeffreysB - Papers of Bertha Jeffreys
- SeriesC - Research
- SubseriesC5-C60 - Research folders
- ItemC5 - Box of index cards labelled 'Bertha Jeffreys', used for listing research folders, arranged by topic and numbered
- ItemC6 - Filing cabinet index to research folders
- ItemC7 - 'Polarisation of cores on Kramer's and Heisenberg's theory'
- FileC14 - 'Rydberg-Ritz formula in Wave Mechanics'
- 8 more...