Copy letter from Arthur William Rucker, to Professor John Milne, Fellow of the Royal Society 'Dear Professor Milne, Professor Knott's paper has been returned direct to him in order that he may enlarge the abstract for publication. I understand that Professor Knott is willing, when that is done, to return the paper to the Society. I am, very truly yours, Arthur W Rucker Sec. R.S. [Secretary, Royal Society]'. 5 January 1897