HARVARD UNIVERSITY THE BIOLOGICAL LABORATORIES 16 DIVINITY AVENUE CAMBRIDGE 38, MASSACHUSETTS November 19, 1958 Professor Joshua Lederberg Department of Microbiology University of Wisconsin Madison, Wisconsin Dear Josh: This letter is highly confti- dential, We are considering a candi- date for an appointment in Botany and have taken the name of Skoog very seriously indeed. Would you be kind enough to write me, as quickly as possible, your appraisal of the man. Please feel free to say anything you think appropriate, In the excitement of the party the other day I quite forgot to con- gratulate you upon the magnificent recognition awarded to your work by the Nobel prize. Please accept my sincere congratulations, Yours sincerely, . \ Kenneth V. Thimann