Copy letter from Robert William Frederick Harrison to Professor [S] Silvanus [P] Phillips Thompson FRS 'Dear Dr Thompson, I had your recommendation with regard to the Archiv fur Optik, but as I am now engaged upon a complete hand list of the current serials, with a view to its being revised at an early date by the Library Committee, it would perhaps be better to keep any new suggestions for consideration with the list as a whole, if you agree.' 10 January 1908