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Addendum to the first check-list of the flowering plants and ferns of the Transvaal and Swaziland

Published in Annals of The Transvaal Museum, in 1920, in volume 6, issue 4, pages 119-135

Contributions to the knowlodge of the Reptiles of the Karroo Formation. 6. Further Dinosaurian Material in the Transvaal Museum

Published in Pretoria Annals Transvaal Museum, in 1920, in volume 7, pages 93-141

Descriptions of some cretaceous ammonites from Pondoland

Published in Annals of the Transvaal Museum, in 1920, in volume 7, pages 142-147

On the South African Notodontidae with descriptions of apparently new Genera and species

Published in Annals of the Transvaal Museum, in 1920, in volume 7, issue 3, pages 149-237