Copy letter from John M [Millar] Thomson, Chairman of the Library Committee of the Royal Society; to Professor JW [John William] Nicholson, FRS, Chairman of the Sectional Committee of Mathematics Regarding Royal Society library exchanges, advises the Library Committee are considering revisions of the lists of foreign exchanges and subscriptions, and requests that the Mathematics Committee revise the list of publications relevant to their department. This letter was also sent to Sir Richard [Tetley] Glazebrook, FRS, Sir William [Jackson] Pope, FRS, Professor WW [William Whitehead] Watts, FRS, Mr Harold [William Taylor] Wager, FRS, Dr SF [Sidney Frederick] Harmer, FRS, Dr FG [Frederick Gowland] Hopkins, FRS, Sir Dugald Clerk, FRS, Professor W Bateson, FRS. 16 January 1920