Smith, 1821 : A Selection of the Correspondence of Linnaeus and Other Naturalists from the Original Manuscripts. vol. 1, London: Longman, Hurst, Rees, Orme and Brown (texte intégral)
Gray, 1825 : A synopsis of the genera of reptiles and Amphibia, with a description of some new species. Annals of Philosophy, sér. 2, vol. 10, p. 193-217 (texte intégral).