Copy letter from Robert William Frederick Harrison, to Dr W M Haffkine In agreement with the arrangement, Harrison had asked the Royal Society's printers to keep a careful separate account of all expenses incurred on Haffkine's paper on preventive inoculation, printed in the 'Proceedings [of the Royal Society]', number 418. The printers have furnished the enclosed bill for £4.15 for excess corrections, the Society having already paid for ordinary composing and printing. Notes the 100 copies which Haffkine received are presented to him by the Society. 15 November 1899