The French, however, continued to pressure Siam, and in 1906–1907 they manufactured another crisis. This time Siam had to concede French control of territory on the west bank of the Mekong opposite Luang Prabang and around Champasak in southern Laos, as well as western Cambodia. The British interceded to prevent more French pressure on Siam, but their price, in 1909 was the acceptance of British sovereignty over of Kedah, Kelantan, Perlis, and Terengganu under Anglo-Siamese Treaty of 1909. All of these "lost territories" were on the fringes of the Siamese sphere of influence and had never been securely under their control, but being compelled to abandon all claim to them was a substantial humiliation to both king and country. Historian David K. Wyatt describes Chulalongkorn as "broken in spirit and health" following the 1893 crisis. It became the basis for the country's name change: with the loss of these territories "Great Siam" was no more, the king now ruled only the core "Thai lands".