(i) Rt. Hon. Robert, Earl Grosvenor, Viscount Belgrave, Baron Grosvenor of Eaton.
(ii) John Turner of Gwern y gasseg, co. Denbigh, gent., John Phillips of Minera, co. Denbigh, gent., James Kendrick of Wrexham, co. Denbigh, banker, and John Humphreys of Berse, co. Denbigh, gent.
Mines of lead ore, calamine and black jack in a piece of common land called Graig Common and roads over the same in the township of Err y ras, parish of Llanarmon, containing 119 acres 1 rood 29 perches (map endorsed, showing engine at Pant y Gwlanod).
Term: 21 years.
Royalty: 35s. per ton of lead ore, 20s. per ton of calamine, and 10s. per ton of black jack.