Mitchell, S. Weir and Edward T. Reichert. 1886. Researches upon the Venoms of Poisonous Serpents. Smithsonian Contributions to Knowledge, Number 647. The Smithsonian Institution. Washington, District of Columbia. 179 pp.
"Characteristics" by S. Weir Mitchell, 1910 The Century Co., New York, NY, USA.
"Circumstance" by S. Weir Mitchell, MD. LL.D. Harvard and Edinburgh. Published 1902 by The Century Co.