 He was subsequently Judge Advocate at the 1945 war crimes trial of former personnel of the German submarine "U-852" for their actions in what became known as the "Peleus" affair.In 1954 Stevenson represented the government of British Kenya during Jomo Kenyatta's unsuccessful appeal against his conviction for membership of the rebel organisation Mau Mau.Later that year he represented the litigants in the Crichel Down affair, which led to changes in the law on compulsory purchase.