Letter from Alfred Daniel Hall, Secretary, Board of Agriculture and Fisheries, 1 Whitehall Place, London, to the Secretaries, The Royal Society, Burlington House He is directed by the President of the Board to ask if the Society would advise on the appointment of a Research Officer and Scientific Advisor for the Ordnance Survey. The salary is £500 per annum rising by increments of £20 to a maximum of £700 with a war bonus. The Survey's scientific work is likely to become of increasing importance: areas for attention include vertical movements of the Earth's surface and their effect on coastal erosion; and periodic revision of the magnetic survey of Britain. Hall describes the conditions of appointment, tour of service and pension. Lord Ernle would be obliged if the Society could assist in the selection of a mathematician capable of carrying out experiments; the candidate should be young, fit, and able to take part in scientific work on the staff of an army in the field. 26 June 1919