HOPKINS MARINE STATION PACIFIC GROVE, CALIFORNIA May 4, 1959 Prof, Joshua Lederberg Dept. of Genetics Stanford University Stanford, Calif. Dear Joshua: This morning I found the book on "Infrared Determination of Organic Structures", by Randall et al., in the room where we met during the weekend. Apparently it belongs in the Chemistry Department of Stanford University., which has led me to conclude that you probably brought it with you on Saturday for the conference, In the past T have sometimes experienced difficulties if a departmental library book, signed out to somebody from another department, was returned directly to that library by somebody else. It therefore seemed best to mail the book to you so that it may be returned to the Chemistry Depart- ment without causing a mixup. With very best wishes, as . C ‘y Stneevety—yours, xn Ys C. B. van Niel vNes =— . wD ya NON