Electric cable leases, Ychwanegu i'r clipfwrdd AML 13/2 Ffeil 1913-1953 Rhan oTredegar Estate Records,
Gas, electricity, water, sewerage, road and bridge leases, Ychwanegu i'r clipfwrdd AML 13/3 Ffeil 1887-1910 Rhan oTredegar Estate Records,