Forensic Science (Sources)
Robert Christison A Treatise on Poisons (Of the Moral Evidence pp. 71-2)
Alfred Swaine Taylor, On Poisons (Legal Definition, pp. 25-7)
Arthur Conan Doyle, The Sign of Four (Chapter 6 - Holmes gives a demonstration)
Francis Galton, Fingerprints (Race/class difference pp. 196-7)
Illustrated Life and Career of William Palmer (Chapter XX)