Memorandum of agreement between Pierce Wynne Yorke of Dyffryn Aled and the Rev. George Strong, one of the Vicars-Choral of the Cathedral Church of St. Asaph Also, lease of minerals from P. W. Yorke to G. Strong "in upon or under" six defined parcels of land lying in the parish of St. Asaph; but in the county of Denbigh, and under all lands of Yorke's in the township of Cefn Meiriadog; three years; terms - £1.10.0. for every ton of lead ore produced, 15/- for each ton of caulk and celamine, and one seventh part of any other mineral produced, "the same respectively being well cleansed washed dressed and made merchantable". 18 February 1806