- FondsJeffreysB - Papers of Bertha Jeffreys
- SeriesJ - Correspondence
- SubseriesJ1-J42 - Family
- 7 more...
- FileJ19 - 'Letters to BB 1950s'
- FileJ20-J27 - Correspondence from Jeffreys to Bertha Blaxby
- FileJ37 - 'Letters from BJ 1958 IAU Moscow & Leningrad Stockholm, Copenhagen'
- FileJ38 - 'Letters from my mother and aunts June-Nov 1959'
- FileJ39-J41 - 'Cousins'
- FileJ42 - 'Bakers'