- FondsJeffreys - Papers and correspondence of Sir Harold Jeffreys
- SeriesB1-B316 - Research
- SubseriesB45-B52A - Natural History
- ItemB45 - 'Nature Calendar'
- ItemB46 - 'Plants'Lists
- ItemB47 - 'Birds'
- ItemB48 - 'Insects and spiders'
- ItemB49 - 'Hancock Prize Essays 1909, 1910'
- ItemB50 - 'Mammals Reptiles Amphibia & Fish'
- ItemB51 - 'Natural Orders'
- 2 more...