- FondsYapp - Papers and photographs of R. H. (Harry) Yapp
- Series3 - Photographic collections
- Subseries1 - Glass plate negatives
- FileNW - North Wales
- 25 more...
- ItemNW27 - River Glaslyn
- ItemNW28 - Pass of Aberglaslyn
- ItemNW29 - Bridge on road to Penygwryd
- ItemNW30 - Snowdon
- ItemNW31 - Snowdon + Crib Goch
- ItemNW32 - Llyn Teyrn
- ItemNW32A - Llyn Gwynant