- FondsYapp - Papers and photographs of R. H. (Harry) Yapp
- Series3 - Photographic collections
- Subseries1 - Glass plate negatives
- FileSM - Salt marsh
- 44 more...
- ItemSM50 - Growing up of channels
- ItemSM51 - Armeria turf from above
- ItemSM52 - Falling spring tide
- ItemSM53 - Falling spring tide
- ItemSM54 - Spring tide Ynyslas
- ItemSM55A - Salt marsh drawings
- ItemSM55B - Salt marsh drawings
- ItemSM56 - Salt marsh drawings
- ItemSM57 - Salt marsh drawings
- 29 more...