Darganfod ac Archwilio’r Casgliad

Hidlwyr dŵr Cwm Elan yn dangos pedestal a Thŷ...

Y Trên Post, Cwm Elan

Trên locomotif o'r enw Nant Gwyllt, Cwm Elan

Trên o'r enw Coel gyda'r Fan Arolygu a Mr....

Dol y Mynach Dam, Elan Valley under...

Craig Goch dam, Elan valley under construction...

Elan Village Postcard sent from Gert to Haulwen...