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)