UNIVERSITY OF ILLINOIS DEPARTMENT OF BACTERIOLOGY 362 NOYES LABORATORY OF CHEMISTRY URBANA September ly, 1950 Dr. J. Lederberg Departnent of Genetics University of Wisconsin Madison, Wisconsin Dear Joshua, Fnelosed you will find a check as a refund for your expenses for vreparing your manuscript for the METHODS IN MEDICAL RESFARCH, I don't need to repeat here that your manuscript was by far the best of the bunch, as usual. Rest regards. Sincerely yours, du S. HE. Luria SEL:mb Enel.