TLS signed “Jonas E. Salk,” one page, 7.75 x 11, University of Pittsburgh School of Medicine letterhead, February 4, 1957. Letter declining an invitation to the University of Chattanooga. In full: “I do appreciate your very cordial invitation to receive an honorary degree on 10 June. I regret I cannot accept since I will be leaving then for the International Poliomyelitis Conference, and our plans for travel to Europe, with our three boys, have been made for some time.” In fine condition, with some mild edge toning. RRAuction COA.
