Copy letter from Herbert Rix, to Dr Keser, 11 Harley Street, W. 'Dear Sir, In reply to your note of Saturday's date, I have the pleasure to inform you that your name has been put upon the doorkeeper's list, for admission to the Croonian Lecture next Thursday. The Lecture begins at half past four. Yours faithfully, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 20 May 1889