(i) Sir Watkin Williams Wynn of Wynnstay, co. Denbigh, Bart.
(ii) John Williams of Llanfyllin, co. Montgomery, gent.
All lead, copper and other minerals under Bryn Calonog, Tan-y-rallt and Cae Gwair in Trawsfynydd, co. Merioneth.
Term: 21 years
Rent: 1/10 part of ore raised.