Material relating to Glynrhonwy Slate Quarry:
- Carriers' accounts, 1835-1839
- Carriers' day books, Glynrhonwy Slate Quarry, 1835 - 1836 and Fachwen Quarry, July-October 1836
- Ledger, 1865- 1879. Details of wage accounts with names of workers, divided into bargain men, day men, carter, tipper, clerk etc.
- Schedule of quarry effects and printed catalogue of plant, machinery, tools, etc., for sale, 1915-1916