These items have now all been merged into the collection D/RB and are now available under the following reference numbers:
1. Photocopies of prospectuses for Great Holway Lead Co. and Holway United Mines, Holywell. 1877-1886 (now D/RB/1).
2. W. J. Houston, 'Limestone Mining at Halkyn [Lead Mines]', Mine and Quarry Engineering, December 1963 (now D/RB/97).
3 - 6. Photographs of Roskell's Shaft, Holway Mine, Holywell, 1957-1964 (now D/RB/35-38).
7 - 8. Photographs of Lloyd's Shaft, Minera, 1957 (now D/RB/40).
9 - 12. City (Meadow) Shaft, Minera, 1964-1969 (now D/RB/41-44).