- FondsJeffreysB - Papers of Bertha Jeffreys
- SeriesC - Research
- SubseriesC5-C60 - Research folders
- FileC38-C43 - '1942 Anomaly in spectrum of O++'
- ItemC38 - Offprint of 'Self-Consistent Field, including exchange and superposition of configurations, with some results for oxygen' by Jeffreys, D.R. Hartree and W. Hartree, with pages of manuscript calculations intercalated
- ItemC39 - Typescript and manuscript rough draft of 'Note on an Anomaly in the Spectrum of O++' by Jeffreys
- ItemC40 - Manuscript tables ?of results of calculations, some in softback exercise book
- ItemC41-C43 - Manuscript calculations and notes