Gave four batches of insects including 517 Coleoptera which he had taken in Paraquay to the NHM between 1902 and 1905 (1902.282, 1903.138, 1904.251, 1905.188) Some were in exchange for determinations. Harvey,J.M.V. et al(1996) p.79 list two manuscripts in the NHM a List of Coleoptera collected by the Sladen Expedition to Santa Anna da Chapada in Matto Grosso, and Central Brazil, 1903; and a list of Collections sent for determination by W.Foster from Sapuray, Paraguay, 1903. (MD 12/02)