Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to George Walker Walker, FRS 'Magnetic Survey. The statement which you supplied recently showing salary, &c, received by you, and hotel and petty expenses incurred in the prosecution of the Magnetic Survey work, has been examined and found correct, to within a shilling or so, undercast, but in your favour. The amount to be charged against the Society stands at £645.17.3; the sum paid out was £620, leaving a balance due to you of £25.17.3. I enclose a cheque for £25.17.3 in discharge of our obligation. Kindly return the accompanying form of receipt.' [no enclosure] 22 December 1914