Pteris crispa
Cyathea fragile
— regia
Hymenophyllum tunbridgense
Isoetes lacustris, q
The following are recommended as good Guides:
Thomas Williams, of Glan y Bala, or the Cottage between the Lakes, Llanberis.
Thomas Phillips, Thomas Griffith, and all the Boatmen at Cwm y glo, Llanrug.
| FEET. | |
| Height of Snowdon, according to the Trigonometrical observations for the General Survey of England and Wales | 3561 |
| Do. By Mr. Wollaston’s Thermometrical Barometer from Carnarvon Quay | 3546,25 |
| Trigonometrically, according to General Roy | 3555,4 |
| Barometrically, according to Do. | 3548,9 |
| Moel Ælia, do. do. | 2350,55 |
| — do. do. | 2371 |
| — do. do. | 2391,8 |
| Highest point of the Rivals | 1866 |
| Cadair Idris | 2914 |
| Garn Fadryn | 1233 |