Copy letter from Robert William Frederick Harrison, to Dr John Allen Harker, [Fellow of the Royal Society] In reply to Harker's letter of the 13th, the usual course must be followed in the case of the blocks which Dr Chappuis requires, which is that he can have cliches. This need not entail any delay in the publication of the 'Philosophical Transactions [of the Royal Society]'. If Harker sent a proof of his section of the paper to Dr Chappuis he could mark such of the figures as he really requires and electros could be prepared accordingly. 15 November 1899