For valuable assistance in obtaining material, I am indebted to Mr. Albert
 H. Morrill, of Cincinnati, a great-grandson of Daniel Drake, and to many
 members of the profession, particularly Dr. Frederick P. Henry, Honorary
 Librarian of the College of Physicians (Philadelphia); Dr. A. G. Drury, Dr.
 P. S. Conner, Dr. Wm. H. Taylor, Dr. Edwin Landy, Dr. H. W. Felter, Dr.
 S. R. Geiser, Dr. R. C. Stockton Reed, Dr. E. S. McKee, Dr. H. Dieckmeyer
 and Dr. Thos. C. Minor, of Cincinnati. Acknowledgments are due Mr. P.
 Alfred Marchand, of the Cincinnati Hospital Library, and Misses Laura
 Smith and K. W. Sherwood, of the Cincinnati Public Library, for their
 courtesy and never-failing readiness to help in research work; also the Hon.
 M. F. Wilson for valuable aid in securing material. I regret my inability
 to mention all those who are entitled to some expression of my gratitude in
 return for assistance rendered and encouragement given. That some attempts
 were made to impede the progress of the work, was not altogether unex-
 pected. Some of the persons, things, events and situations of the recent past
 have not sufficiently receded into the mist of the distant past to have entirely
 lost the glow of life or to have assumed the placid garb of historical dis-
 interestedness.
   In the preparation of "Daniel Drake and his Followers" much assistance
was given by some of the older physicians in the way of oral information.
The gathering of the portraits involved a good deal of labor, but was made
interesting and pleasant by the uniform courtesy and willingness with which
people in all parts of the country aided the author in this arduous and time-
robbing task. Many of the portraits are rarities of the greatest historical
value. The following bibliographic references represent the sources whence
the contents of this book were largely drawn:
   1-Medical journals, especially those published since 1822 in Cincinnati,
Lexington and Louisville.
   2-The writings of Daniel Drake.
   3-The writings of Samuel D. Gross, especially his "Autobiography."
   4-Cist's "Cincinnati." 1841. 1851. 1859.
   5-Ford's "Cincinnati." 1881.
   6-Nelson's "Cincinnati." 1896.
   7- 'Centennial History of Cincinnati," by C. T. Greve, a work upon
which too much praise can not be bestowed. It is a veritable mine of informa-
tion. It contains a valuable chapter on "Medical Cincinnati " by Dr. A. I.
Carson.
   8-Controversial pamphlets written at various times by different indi-
viduals, especially D. Drake, A. Goldsmith, J. C. Cross, J. F. Henry, J. L.
Vattier, M. B. Wright, G. Blackman, J. A. Thacker, etc., etc
   9-The transactions of various State Societies.
   10-Annual Catalogues and Announcements of medical schools.
   11-Annual Reports of Colleges, Hospitals and other public institutions.
   12-Books of medical biography, by Williams, Atkinson, Gross, Stone,
and others.