Unpublished research by the donor titled 'Minera and district 1714-1914' (2012), based on the history and geology of the locality of Minera, co. Clwyd. One volume with one unbound chapter and associated loose leaves, including notes, a letter and a photocopy.
Research is based heavily on the Plas Power archive at NLW, and chapters include (but are not restricted to) the local Myddelton family of Chirk Castle, the William Lloyds' of Plas Power, industry, and agriculture.