Farey, John (c1814). ‘A [Geological] Map of Derbyshire and parts of the seven adjacent counties shewing the principal Strata and Soils', and  ‘A Section of the three lowest assemblages of Strata known in Derbyshire’. Extracts from Farey’s (1811) General View of the Agriculture and Minerals of Derbyshire; with Observations on the Means of Their Improvement Drawn up for the Consideration of the Board of Agriculture and Internal Improvement. London: Printed by B. McMillan. Engraved folded hand coloured map at 1inch to 6.5 miles, plate area 31 x 23cm in sheet 42 x 26 cm. Clear plate mark, clean bright colours, water mark 1814. Section one inch to .25 mile,  11 x 19cm in page 14 x 22 hand coloured engraving, clear plate mark. Both in very good condition.