Copy letter from Archibald Geikie to Dr [Charles] Chree 'Dear Dr Chree, In answer to your letter of 22nd let me say that your diagrams seem all quite clear and that the engraver will prepare a first sample reproduction of one of the 8 [lects] which will be put on the plate. I am glad to have the curves in as to get on the with engraving of them' 25 January 1909