Rhif Archif
6170013
Disgrifiad
Henllys Colliery; plan showing leats and tramroads as existing in 1905, produced by Geoff Ward for Council for British Archaeology and published in the CBA Research Report 79, fig 24
Enw Casgliad
Drawings Collection
Cyfrwng
Graphic.
Cychwynnwr
Mr Geoff A. Ward, RCAHMW
Dyddiad
c. 1992