Halkyn District United Mines: plan showing geological features on Old Drainage in area of Powell's Lode.
Scale: 1 inch to 50 feet.
126 cm x 38 cm.
D1/7.
Halkyn District United Mines: plan showing geological features on Old Drainage in area of Powell's Lode.
Scale: 1 inch to 50 feet.
126 cm x 38 cm.
D1/7.
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