Rhif Archif
6443161
Disgrifiad
Drawings relating to Afon Twrch Aqueduct on the Swansea Canal.
Enw Casgliad
SC - RCAHMW Swansea Canal Publication Collection
Cyfrwng
Graphic.
Cychwynnwr
Mr Douglas B. Hague, Stephen R. Hughes, RCAHMW
Dyddiad
1974 to 1979