(i) Sir Roger Mostyn of Mostyn, Baronet.
(ii) Henry Steeple of Holywell, co. Flint, gent.
Premises in D/M/883 [mines of lead, copper, caulk and calamine under fields called Coitia Mawr, Yr Erw, Coitiar Bryn, y Bryn, Coetia Issa, Coitia ucha, a small croft by the road side, Erw w Mynydd and Coitiae pen y Ffordd in the townships of Tre Eden Owen and Mertyn uchglan in the parish of Whitford, co. Flint].
Term: 21 years.
Rent: 30s. per ton of lead ore, boose and smitham, 20s. per ton of caulk and calamine, and one seventh of all copper.