- FondsJeffreys - Papers and correspondence of Sir Harold Jeffreys
- SeriesC1-C35 - Lectures
- SubseriesC7-C29 - Various addresses
- FileC7 - An applied mathematician looks at pure mathematics
- FileC8 - Continental Drift
- FileC9 - The duties of an applied mathematician
- FileC10 - Fisher and inverse probability
- FileC11 - Half a century in Geophysics
- FileC12 - Johnian Mathematics 1910-1914
- FileC13 - Mountain Formation
- FileC14 - Nutation and Nutation & variation of latitude
- FileC15 - Origin of Solar System
- 14 more...