Philosophical Magazine, 3rd Series (1845), vol. xxvi. p. 522. See also De Morgan’s evidence before the Royal Commission on the British Museum in 1849, Report (1850), Questions, 5704-5815, 6481–6513. This evidence should be studied by every person who wishes to understand the elements of Bibliography.

English Cyclopædia, Arts and Sciences, vol. v. p. 233.

Swainson, “Treatise on the Geography and Classification of Animals,” Cabinet Cyclopædia, p. 201.

Darwin, Fertilisation of Orchids, p. 159.

Descent of Man, vol. i. p. 214.

Laws of Botanical Nomenclature, p. 16.

Waterhouse, quoted by Woodward in his Rudimentary Treatise of Recent and Fossil Shells, p. 61.

Bentham’s Handbook of the British Flora (1866), p. 25.

Philosophia Botanica (1770), § 157, p. 99.