Copy letter from Herbert Rix, to Professor Michael Foster, [Royal Society] 'Dear Sir, I beg leave to remind you that you undertook to write to Dr Percy Frankland about his account. You will require the account to inclose with your letter, and accordingly send it herewith. Yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 26 July 1894