Copy letter from Robert William Frederick Harrison to Dr C [Charles] Chree FRS 'Dear Dr Chree, In reply to your letters of the 15th and 17th which I found on my return here, I have sent a copy of the circular letter as you suggest to the Superintendent of the US Survey at Washington. With regard to the to the other letter you indicate, am I to understand that you wish me to write them or that you are writing them? In the former case I should require the letters which are still in your hands, but as the nature of the correspondence is technical you probably will be writing yourself. I enclose another reply from the Melbourne Observatory which came in the other day.' 30 September 1910