Rhif Archif
6062436
Disgrifiad
File of Cadw scheduled monument records for North Portal, Pwll Du Tunnel, Hill's Tramroad (MM224) , consisting of scheduling notices, accompanied by Field Monument Warden reports. Files stored in scheduled monument number order.
Enw Casgliad
Cadw Scheduling Records
Cyfrwng
Text, Cartographic.
Cychwynnwr
CADW
Dyddiad
c. 1990