John Gerrard Keulemans
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Johannes Gerardus Keulemans was a Dutch bird illustrator. For most of his life he lived and worked in England, illustrating many of the best-known ornithology books of the nineteenth century.
An illustration of the extinct great auk by Keulemans
Red-banded fruiteater (Pipreola whitelyi), 1886
An older Keulemans
Irrisor jacksoni and Scoptelus castaneiceps
Edgar Leopold Layard
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Edgar Leopold Layard MBOU, was a British diplomat and a naturalist mainly interested in ornithology and to a lesser extent the molluscs. He worked for a significant part of his life in Ceylon and late
Title page of "Birds of South Africa" 2nd Ed.