Copy letter from Robert William Frederick Harrison, to Joseph Norman Lockyer, Fellow of the Royal Society 'My dear Sir, In pursuance of the conversation with the Committee this afternoon, I am directed to ask you to be good enough to have the original positives of the "Baden-Powell" photographs left here, where every care shall be taken of them, in order that Professor [Arthur William] Rucker or myself may make the necessary enquiries as to their reproduction. I am, yours faithfully, Robt Harrison Asst. Sec. R.S. [Assistant Secretary, Royal Society] I should be glad to know the name of the man whom you said you knew of as specially qualified for this class of reproduction by photographic process'. 12 January 1897