(i) Rt. Hon. Richard, Lord Grosvenor, Baron Grosvenor of Eaton, co. Chester.
(ii) Francis Oldfield of Mold, co. Flint, gent.
Mines of lead ore and calamine on Halkin [Halkyn] Mountain, parish of Halkin, co. Flint, containing five mears and a half in length and fifteen and a half in breadth, and in a small piece of waste ground in the village of Halkin Llan, being part of the lane leading towards Halkin Pentre, and also in parts of the lanes leading towards Northop and Flint; and also in lands in the township of Lugan Llan, parish of Halkin (map attached).
Term: 21 years.
Royalty: 30s. per ton of lead ore, boose and smythom, and 20s. per ton of calamine.