Letter from C R Barnett, Librarian, United States Department of Agriculture, Washington D C, to the Secretary of the Royal Society, Burlington House, Piccadilly, London 'Dear Sir: We are desirous of obtaining for the use of this Department Part 1 and " of the Report of the Commissioners for the investigation of Mediterannean fever. The later parts of the Report we already have. If you can supply us with these early publications we shall be most grateful. The Royal Society receives many of the publications of this Department free of charge and we trust that we may obtain the publications mentioned above as an exchange. Thanking you for your favors to us in the past, I am, Very respectfully, C.R.Barnett.' 15 July 1907