Peile, Williamson, (1831), ’Description of a Group of Dykes, termed Riders, discovered in Whitehaven Colliery’, extract from Trans. Nat. Hist. Soc. Northumberland, Durham & Newcastle . v1,
Peile, Williamson, (1831), ’Description of a Group of Dykes, termed Riders, discovered in Whitehaven Colliery’, extract from Transactions of the Natural History Society of Northumberland, Durham and Newcastle upon Tyne, 1831. v1, pp 160-164 + a plate. Plate includes section and plan of the ‘Locality of the riders in the Croft Pit, Whitehaven Colliery. 1:1800 scale, colour limning. Text and plate age-toned and clean. In very good condition.