Copy letter from Robert William Frederick Harrison, to The Editor, 'British Journal of Photography', 24 Wellington Street, Strand, W.C. It is not custom to lend the original blocks of illustrations appearing in the 'Proceedings [of the Royal Society]', but if it is convenient, Harrison will instruct the printers to prepare electros from the original blocks illustrating Dr Russell's paper on 'The Action of Plants, etc' and to send them on with their account. An acknowledgement of their origin will be necessary. 22 November 1906