Copy letter from Robert William Frederick Harrison, to Henry Young, Royal Institution, Albemarle Street, W. 'Dear Sir, I am in receipt of your letter of the 5th inst. [instant], and have given instructions to our printers to send you electros of the three diagrams in Dr Frankland's paper. I am, yours truly, Robt Harrison Asst. Sec R.S. [Assistant Secretary, Royal Society]'. 7 May 1896