With Grigg's opposition widescale change did not occur until 1930 when the Colonial Office ordered that the Indian Penal Code be replaced with a system based on English law. After this point Kenyan juries occasionally returned unexpected verdicts, but with the discretion allowed by the Indian Penal Code's treatment of homicide removed, these became less common. The administration of Governor Joseph Byrne (1931–38) saw settlers receiving less treatment and legal reforms reducing the discretion judges had on sentences. Despite this Kenyan settler opinion remained in favour of "rough justice" to Africans for decades, coming to the fore again during the 1950s Mau Mau rebellion.
