the Forefield, where the deceased had been at work; and by the information of William Briddon who was working near him; it appears that a large stone fell upon him out of the roof, and it is our opinions the said stone was the cause of his death. Structure of industry The free mining arrangement under the rules of the Duchy of Lancaster was the normal state of affairs in the Duchy manor of Wirksworth. The Duchy's lessee of the mineral rights at the end of the 16th century, Gilbert, Earl of Shrewsbury, had established his right to the dues of lot and cope against attempts by local landowners to assert right to mines on their land. Shrewsbury's success embedded the old rules and facilitated free mining. There was one independent area within the Wapentake, Griffe Grange, near Brassington, held by the Gell family of Hopton since Ralph Gell had leased it from Dale Abbey and bought it from the Crown Commissioners at the dissolution of the religious houses by Henry VIII. The Gells, however, ran their mines under similar rules to those in the Duchy, the only difference being that the miners paid their dues to them. Attempts by other landowners to establish the same rights as the Gells were largely unsuccessful. An example occurred at Elton, where the landowner, Francis Foljambe, prevented the application of Duchy rules, employing wage labourers in the Elton mines and seeking sanction for his action in the courts. The Duchy Court, however, issued an injunction against him in 1627, instructing him "to conveane or execute noe other suite or suites hereafter att the Comon Lawe ... concerning the lott and copp and lead mynes in Elton". This ruling was applied in all the Duchy liberties, though there was a renewal of opposition from landowners after the Restoration of 1660. For historical reasons the structure of the industry was different in the High Peak where, mainly because of very long leases, there had been a blurring of the Duchy's authority, and the two largest landowners, the Manners and Cavendish families, maintained claims to mining rights and dues. The miners fought hard, physically and in the courts, to obtain the free mining rights enjoyed in the Wirksworth Wapentake. The Manners family met them head-on, refused all attempts to establish free mining, and employed miners as day labourers in their mines. Their Cavendish neighbours at Chatsworth,