In the 1840s, the civil engineer Peter Bruff (1812–1900) designed what was then the largest brick structure in Britain, the 1,000-foot-long Chappel Viaduct in Essex. He went on to become a railway entrepreneur and developer, and was responsible for the creation of the resort town Clacton-on-Sea, where he also designed many of the buildings. In this illustrated guide, first published in 1838 and here reissued in the revised and expanded two-volume second edition of 1840–2, he discusses the theory and practice of surveying (calculating the accurate position of points in the landscape) and levelling (calculating the accurate height of points). Volume 1 covers surveying by measuring chain and by the taking of angular measurements, and gives example surveys for land boundaries, parishes and railway lines. Volume 2 is devoted to levelling, examining the instruments and methods to be used to calculate 'sections', or elevation profiles.