A map, 1758, of William Lloyd's estate in the parish of Bodfari, together with a map and index, 1759, of his estate in the parish of Wrexham and the township of Minera, and a letter, 1808, concerning the enclosure of land in Minera. While not explicitly industrial, these maps were found with industrial papers, suggesting that they were used in identifying areas for mining and other industrial development.

Unpublished research by the donor titled 'Minera and district 1714-1914' (2012), based on the history and geology of the locality of Minera, co.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.

Faculty papers with associated correspondence and some plans for the church of St Mary, Minera, 1909-1994.

Faculty papers with associated correspondence and some plans for the church of St Tudfil, Minera, 1935-1992.