Excerpt:
Henry Bernard Davis Kettlewell (1907-1979) was an outstanding lepidopterist and geneticist, best known for his work on industrial melanism in the Lepidoptera which illustrates evolution in action. He is also well known as an enthusiastic field worker and as a popularizer of science, and was co-founder of the Rothschild-Cockayne-Kettlewell Collection of Lepidoptera (now National Collection RCK) in the British Museum of Natural History.