“Hewett Cottrell Watson (1804-1881), phytogeography, evolution.” Frank N. Edgerton. Dictionary of Scientific Biography 14:189-191, 1976.
Hewett Cottrell Watson: Victorian plant ecologist and evolutionist. Frank N. Edgerton. Ashgate, Burlington, Vermont, USA, 2003.
Contributions: History of the Ecological Sciences, Part 36: “Hewett Watson, Plant Geographer and Evolutionist.” Frank N. Edgerton. Bulletin of the Ecological Society of America 91:294-312, 2010.
“Darwin’s botanical arithmetic and the “principle of divergence”.” Janet Browne. Journal of the History of Biology 13:53-89, 1980.