```markdown Daly, M.: British Administration and the Northern -۱۱ Sudan 1917-1924 (Leiden, 1980), quoting Sir James Robertson in an interview with him on 18 June, 1975. N.R.O. Ansar 8/1, Archer to Sayyid Abd al - Rahman, 9 -۱۲ July, 1927 يوجد النص العربي لهذه الرسائل في: P.R.O., F.O. 371/10065 N.R.O Sec 6/9/52, Memorandum by Lethen on -١٤ Mohammadan Movement in Northern Nigeria, 18 October, 1925. P.R.O. Cab2/4, Minut 7(Mahdism) of the 215th meeting - ١٥ of the C.I.D., 22JULY, 1926. N.R.C. Ansar 8/3 --١٦ أنظر: Ibrahim H.A. "Imperialism and Neo-Mahdism in the -۱۷ Sudan, a Study of British policy towards Neo-Mahdism," I.J.A.H.S. 13,2,1979, PP. 217 -20 P.R.O. F.O. 371/11613, AN Intelligence -۱۸ report, 25 May, 1925 P.R.O. F.O. 371/19096, note on -١٩ Mahdism, 28 April, 1935 الصادق المهدی ، جهاد في سبيل الاستقلال «الخرطوم» بلا تاریخ ص ٤ - ۲۰ N.R.O. Sec 6/8/51, note on -۲۱ Mahdism, 4 December, 1934 Warburg, G. : Islam, Nationalism and Communism in a-۲۲ Traditional Society, the case of the Sudan (London, 1978) p.34 N.R.O. Sec. 6/8/49, general note on Mahdism and-۲۳ Sayyid Abd al - Rahman 1926 -32, 3 May, 1931 الصادق المهدی ، جهاد في سبيل الاستقلال ، ص ۲۹ - ۳۰ - ٢٤ ۲۰ ```