Magnetic survey of the British Isles, conducted by George Walker Walker Data gathered in support of Walker's magnetic survey. Commencing with observations made at Cambridge and Greenwich Observatories, 10 November 1913-21 March 1914. Continuing at various locations in England, Wales and Scotland, beginning at Chichester and concluding [in this volume] at Tarbert, Kintyre. The observations include azimuth [read from the Sun], declination, vibration, deflection and inclination of specified magnets and dipping needles. Inscribed on the flyleaf: 'Magnetic Survey of British Isles started 10th Nov 1913'. 10 November 1913-20 August 1914