Major Colby (2 results)

Hardcover. Condition: Very Good Plus. First Edition. 1855.xxiii, 252pp plus errata and map to rear. "Abstracts of the Principal Lines of Spirit Levelling in Ireland" was an important technical publication of the British Ordnance Survey, documenting the measurement of heights across Ireland. It was part of the scientific work that established a consistent system of elevations for the nation's maps. It preceded the volume on England and Wales which was published in 1861. Contains tables of numbers and descriptions of Bench Marks, approximate distances between the consecutive bench marks, altitudes and the OS map sheet number. The Bench Marks were distinctive marks (often "crows' feet") stamped or carved onto buildings or stones. Original or contemporary grey cloth with gilt titles to spine and blindstamped bands to spine and double border to boards. The binding is in excellent condition with perhaps a neat repair to the top 1.5 cm of the front hinge. Light foxing to endpapers and prelims. PLEASE NOTE: Heavy book so extra will be needed for shipping to non-UK customers.…

No Binding. Condition: Very Good. Only west half present, eastern half is all sea. West margin completely missing, south margin trimmed with some loss of information. State 6 or 7. Pre 1854. 1inch to the mile. Linen backed.