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 Campbeltown, on the Kintyre Penisula, Argyll and Bute, Scotland, and concluding at Wheelock, Sandbach, Cheshire, England. The observations include azimuth [read from the Sun], declination, vibration, deflection and inclination of specified magnets and dipping needles. 21 August 1914-12 October 1915