(i) Rt. Hon. Robert, Earl Grosvenor, Viscount Belgrave, Baron Grosvenor of Eaton, co. Chester.
(ii) Joseph Williams of Castell, parish of Ysceifiog, co. Flint, miner, and Robert Williams of Ysceifiog, joiner.
Mines of lead ore, calamine and black jack in land at Dog Pit, being part of Halkin [Halkyn] Mountain, containing 4 acres 1 rood 16 perches (map endorsed).
Term: 21 years.
Royalty: 40s. per ton of lead ore, 20s. per ton of calamine, and 10s. per ton of black jack.