Yorkshire, North Riding: Grinton. Plan showing His Majesty's lead mines. Gives names of proprietors. Scale: 1 inch to about 21 chains. Compass star. Annotated: certification that this is a true copy, examined 29 October 1768, of the plan by George Jackson, surveyor, referred to in his state of the said mines, dated 18 October 1768. 'No. 254' in top right-hand corner.
For Jackson's original plan, and a 19th century copy, see respectively