He moved permanently to British East Africa in 1908, where he later led the Livermore expedition, with the aid of A.P.de K.Fourie, that opened up the Ngorongoro Crater to European hunters.
[1] He held several world records for big game at various times, and killed over 1,000 rhinos in Kenya, most of them in the Makueni hunting ground, which the Government needed to get rid of, in order to give these lands for re-settlement of the Kamba people.
Besides safaris and other control operations for the Kenya Game Department, in Makueni Hunter killed 996 alone, from 26 August 1944 to 31 October 1946.
In later years, he became concerned about the possible extinction of the wildlife he had so assiduously hunted, and spoke in favour of conservation.
[2] He was a friend and contemporary of Denys Finch Hatton, who was portrayed by Robert Redford in the movie Out of Africa.
Also published under the title Tales of the African Frontier (Harper & Brothers, USA 1954)[8] and the basis for the 1959 movie Killers of Kilimanjaro.