Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to the Assistant Librarian, Smithsonian Institution, Washington, USA 'I fear it is impossible for us to comply with your request for a copy of the new volume of the Catalogue of Scientific Papers. The fact is that the Catalogue is not now the property of the Society, but is being used by the Cambridge University Press. I enclose a copy of the circular which has been printed to explain the situation. From this you will see that we are unable to present any copies to Exchange Institutions and that the present series of the Catalogue is only obtainable by purchase.' 22 April 1915