Copy letter from Robert William Frederick Harrison, to Professor Wyndham Rowland Dunstan, Fellow of the Royal Society, Director, Scientific Departmet, Imperial Institute, S.W. 'Dear Sir, In reply to your letter of the 16th inst., if you will return the defective copy of the "Proceedings [of the Royal Society]" to which you refer, it will enable me to make enquiry into the circumstances of the omission and to forward you a complete copy in its place. I am, yours faithfully, Robt Harrison Asst. Sec. RS. [Assistant Secretary, Royal Society]'. 18 May 1896