Plate XXX “Rhinoceros simus cottoni, male”. Swan Electric Engraving Co.Ltd.
Plate XXX at p. 198 in Trouessart, E.-L., 1909. Le rhinoceros blanc du Soudan (rhinoceros simus cottoni). Proceedings of the Zoological Society of London 1909 February 16: 198-200
The male rhinoceros in the photograph was shot in 1908 in Bahr-el-Ghazal by a hunter who wished to remain anonymous (says Trouessart).