Malham
- Bolton MSS (Duchy of Devonshire) extracts from Duty Ledgers 1745-1840.
- Warren, S. “Pikedaw Calamine Caverns”, 1996.
- Myers, J.O. “Some questions concerning the history of the Pikedaw Calamine Caverns” British Mining, No.55 (1995), pp.94-111.
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