Francis Deng was in his second year in 1958-9, one of only four or five Southern law students. He was one of the favoured sons of Deng Majok, the well-known Paramount Chief of the Ngok Dinka, the only Nilotic people to live in Northern Sudan. Francis was quite short for a Dinka, only about six-foot, but he was recognizably Nilotic and, without putting on airs, had a dignified aristocratic bearing. He spoke very good English and Arabic and, in some...