Introduction. 1. The rise of Sabya and Abu Arish, 1730-1923, (1142/3-1341/2). 2. Syed Mohammed el Idrisi: the first revolt, 1900-1914, (1317/18-1333). 3. The Anglo-Idrisi treaties, 1914-1925, (1333/1344/5). 4. The Red Sea blockade and struggle for influence on the Yemeni littoral, 1902-1919, (1320/1338). 5. The Armistice: the struggle for Asir and the Tihamah, 1919-1923, (1337-1342).. 6. The British and Idrisi occupations of Hodeidah, 1918-1925 (1337-1344). 7. Family intrigues and Civil War, 1923-1927, (1341-1346). 8.  Britain's bid to accommodate Imam Yahya and decline in Anglo-Idrisi goodwill, 1923-1927, (1341-1346).. 9. Imam versus Idrisi and Ibn Saud's intervention, 1923-1927, (1341-1346). 10. Foreign penetration in South-West Arabia and the failure of British policy 1919-1934, (1337-1353). 11. Mineral concessions in Asir, 1910-1930, (1328-1349). 12. Preparations for the dismemberment of Asir, 1926-1933, (1344-1352). 13. Comeback and elimination of the Idrisi, 1933-1936, (1352-1355). 14. Conclusion, 1936-1973, (1355-1393).