Whatever the ultimate appraisal of this book on the Doctors Mayo, it is clear that Miss Clapesattle has made a notable contribution to medical biography. Throughout the eight hundred odd pages of detailed material, which would do credit to a standard nineteenth century double-decker, interest never flags. This is partly to be credited to Miss Clapesattle's simple and vivid style, but even more to her subject, which contains all the elements of biographic drama. Full of color is the description of pioneer days in the Middle West and of country practice in Minnesota as built up around the "old doctor." But the accession of the two young physicians—Dr. Will and Dr. Charlie—and the story of the development of their monumental achievement become downright thrilling. It is especially interesting to have set forth the true account of the tornado and the beginnings of St. Mary's Hospital—events which have become much distorted