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Portlock, JE (1869). Memoir of the Life of Major-General Colby, together with a Sketch of the Origin and Progress of the Ordnance Survey of Great Britain and Ireland: . Skeely Jackson.
Sheppard, Thomas (1920). William Smith: his Maps and Memoirs. Hull: Brown and Sons, 253pp + 26 plates. Hardback. A. Brown & Sons.