Co- founder, with his brother Charles, of the renowned Mayo Clinic. TLS signed “W. J. Mayo,” one page, 8.5 x 11, Drs. Mayo, Graham, Plummer & Judd letterhead, August 22, 1911. Letter to Dr. George Senn. In part: “Mrs. Talbot was operated upon this morning. We did a total hysterectomy for advanced carcinoma of the cervix…Later, if she does well, we will amputate the right breast for carcinoma.” Intersecting folds and some scattered light toning and wrinkling, otherwise fine condition. RRAuction COA.