Hafod Tanglwys and Perthigleision Collieries, Plan Showing Workings in the Little Vein (Brithdir Seam) (H12)

Scope and Content

Plan showing workings dated [1869-1892]. National Coal Board, South Western Division. Scale 1:2500.

Custodial History

Former reference number: DNCB/70/45/2/12