On the split within the Shammar in the XXth century

I finally have the answer to a lingering question about the leadership of the Shammar Bedouins in North Arabia. Some twenty years ago, when asking about the ownership of a number of lines of desert bred Arabians, I was confused by references to at least four contemporary “Sheykhs of the Shammar” within the leading Jarba family.  The Kuhaylan Krush were the horses of Mayzar Abd al-Mushin al-Jarba, Sheykh of the Shammar; the Shuwayman Sabbah were the horses of Mashaal Pasha son of Faris al-Jarba, also Sheykh of the Shammar; and the Hadban Enzahi were the horses of Dham al-Hadi, also Sheykh of the Shammar; the Saqlawi Jadran adn the Dahman Amer were the horses of Ajil al-Yawir al-Jarba, also Sheykh of the Shammar. All four had lived around the same time. What was going on? Later I came to understand that this had to do with political splits within the leading family, which were caused or at least encouraged by the Ottoman Turks, then the British and the French, but I never had the full picture. Here it is now, in the clarity of intelligence report such as this one published by the French army in 1943: “Autrefois, lors de leur unite, les Chammar ont beaucoup…