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...
