Copy letter from Robert William Frederick Harrison, to the Editor, Nature 'Dear Sir, The two Electros (Ceylon Report Illustrations) sent here on the 22nd inst. [instant] were sent in error. They were ordered for NATURE from our printers, who prepared them and delivered them to your office, and who have sent or will send you their account for them. I therefore return them with this. Yours faithfully, Robt [Robert] Harrison Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 24 March 1904