JOHN E. PFEIFFER NEW HOPE, PA. Po. Bry 19°) May 4, 1959 Dear Dr. Lederberg, I am sorry we did not cross paths before or during wy trip to Europe, but perhaps we way soon. The evolution book is to be published in October--and I aw at present considering a project which, for me at least, prombses to be far more difficult. I should like to prepare a series of semipopular, or semitechnical, articles on basic research in the area of DNA-RNA, protein synthesis, phage and virus genetics, etc. I suppose one could call that the area of moleculer or biochemical genetica. The articles would be addressed to students whom we should like to intereat in such research-~and perhaps to physicians who should know more about an area whose findings may be influencing their practice more and more. I very much hope that we can meet and discuss some questions that concern me. Do you plan to come east in the foreseeable future? For example, will you attend the Brookhaven symposium’, I look forward to hearing from you. Sincerely,