Definition of "roke"

It was found by examination of numerous sections of roky shell that it was not possible to estimate the extent of a roke by its appearance on the surface. The filing of a groove across the roke gives some […] indication as to its depth, […]

1921, Iron & Coal Trades Review, volume 103, page 337

of which custom the aforesaid John Parlby being not in the least ignorant, on the 20th day of Jun, in the second year of the reign of our Lord the present King, at the same pit, received and had a whole roke of coals, value 18d., by the delivery of the said Richard, together with a sign for one whole roke, according to the custom aforesaid;

1889, “Action for Breach of a Custom observed in delivering Coal at Wollaton Pit, 1549, April 1”, in Records of the Borough of Nottingham: 1547-1625, page 11

In 1450 certain lands at Codnor were exchanged subject to the condition that one of the parites should receive yearly three roke of coal if any 'myne of cole' were got.

1907, William Page, The Victoria History of the County of Derby - Volume 2, page 351

Account of coal getting, from 13 February to 24 December, 17 Henry VIII., giving the quantity got by each collier week by week, in the following form: “ L. Lambe gatt xiii roke

1924, The Mining Engineer - Volumes 66-67, page 226